I figured I’d write this out since there will be future collection events coming and it will be a useful method to work on to maximize your Sacred Crystal expenses to get the optimum amount of collection items. They are pretty straightforward though you will want to work on the math a bit here and there. Before you continue reading however, I would remind that this is best done when the event is revealed and you have gone through a bit of the maps because it is pointless to draft predictions until you are absolutely sure how well you are in tackling the event maps and how the event is getting rolled out, whether there are maps being withheld or not.

Context Fixing
With every mathematical calculation some variables have to be kept constant for accurate results. For collection events these are a few variables that you must know and set before approaching the prediction math:

1 Target
You have to set a target as to what number of collection items you are aiming for. This is naturally the goal of the calculation, and without the end target you will not have an end goal to work with.

2 Drop Rate
Understandably without a constant output you cannot calculate or project your expenses as accurate as possible. In most collection events the last couple of maps will always have a 100% drop rate to certain collection item packs; some events will have more, others less. Knowing the drop rates are important, especially the 100% ones because not only it helps in the calculation, it will also help you decide which map is the target map you want to farm.

3 Target Map
Once you have the drop rate info, you want to set a target map that you will farm on. This is important as it gives you an idea of the stamina and charisma you are looking to spend on every run, and to a certain extent the experience gain from these maps for you to plan for any possible stamina/charisma refill in the middle of the event (the latter most likely will happen). Also be realistic to the target map; pick the one that you know you absolutely can generate the sure drop items 100%. Misses will skew your prediction pretty hard.

Tools
Once you’ve done fixing constants you are good to go, but before you start you will want to use a couple of tools to help you out. Of course because it is mathematics a paper and a pen is all you need, but if you are playing on a computer then software can help to speed up the process quite nicely.

Naturally you want to use a spreadsheet tool. It covers all the required software you need individually; a calculator, an organized worksheet, can cope with data updates well.

However if you feel that you want something that isn’t too complex (surely spreadsheet tools aren’t that complex right?), I only use a Sticky Note and a Calculator software.

The Math
We are here finally. I can actually write a mathematical equation for this, but lets go with step-by-step. A few things have been set as constants at this point, so we want to start from these constants and work the way up.

1 Free Runs
Going into the event once you have found a consistent map to farm you want to calculate the free runs you can make throughout the event. First you want to calculate the ratio of charisma/stamina spending to know when is the right time to spend your crystals. In most scenarios the charisma cost will not be as heavy as stamina cost due to their recovery rate.
Regardless, always use the one with the slowest recovery time for each run as the counter. For example, Vampire Bride’s Map 8 takes 60/6 each run, attributing to 3/6 hours of recovery per run. Take 6 hours and you make up 4 runs per day.

Then you determine the start and finish point of the event to get the total free runs left. You need 2 information to do this correctly: the time when the event ends and your current charisma/stamina status. For example, Vampire event ends at 6am PST on the 30th. Today is 23rd, and the time is 12.00pm PST. Your current stamina is 4, and will become 5 at 12.30pm. This means that right now your counter is 0, and will become 1 at 1.30pm PST when your stamina turns 6. Then you just keep adding the daily runs you can get which is 4 in this case up to the last possible run you can get which is 1.30am on the 30th, giving you 26 free runs in total. Note that you always want to set the time at 3.00am PST instead of 6.00am unless stated at the poster to provide a buffer in case a maintenance kicks in.

2 Collection Item Math
Once you get the total number of free runs it is time to calculate your item. Firstly, always assume the minimal drop to get the worst case scenario. For example, the worst drop you can get from the map you are farming is 10, with the best drop at 16. Take the 10 instead of the 16. With a total of 26 free runs left you can generate at least 260 collection items.

Then, add this value to the current collection item you already have to get a projected total if you do not spend any crystals. In this case say you now have 600 collection items. Adding this to 260 that you can get you are now at 860.

Now take the target amount you initially set and subtract 860 to get the required amount you are still short of. If the value is negative you don’t have to spend any crystals at this point. If it is a positive value you will have to spend. So say your target is 1000; you are short of 140, so spend away. If your target is 800, you are looking at a 60 surplus, no spending required.

The number of crystals you have to spend depends on your generation limit. Taking stamina for example, If you are at level 120 one crystal spending gives you 14 stamina and this is added to your current stamina count allowing overflows so you don’t waste any bit. Example: You have 2 stamina right now and are at level 120, 1 crystal will set you at 14+2 = 16 stamina. If you are level 140 you get 15+2 and so on. With this in mind, you now can calculate how many crystals you have to spend to generate 140 items. Using the minimum drop rate of 10 you need 14 runs, which is 64 stamina. Taking this and divide by your stamina limit gives you the total maximum crystal you need. For example you are at level 120 (14), 64/14 = approximately 4.57. For any decimal point you get you round up and not down, so even if it is 4.1 you are going to spend 5 crystals max.

Other Important Tips
Here’s a couple of extra tips (and math) if you are a stringent and frugal spender.

1 When to spend your crystals
A rule of thumb when I spend is always at the point when I know I have enough charisma to cover every run possible such that my stamina won’t overflow after completing the spending run. For example, if I am farming a 60/6 map and falls between level 120-139, I will spend when I have more than 120 charisma and less than 5 stamina. This gives me 19 stamina when a crystal is spent, and I can run 2 rounds putting myself at 7 stamina. Even if my charisma is 0 after the 2 runs they will recover in 3 hours of which I will only be holding at 10/14 stamina then for another run, dropping my stamina further down to 4/14.

2 Spend crystals at the recovery refresh timer to maximize efficiency
This can be too much, but I only spend my crystals when the stamina timer resets. For example, I will spend when the stamina timer is around 55.00-60.00. Anything below that (0.01-54.59) I will rather wait for another hour. This allows me to keep track of my stamina refresh rates so I can better time my free runs. Note that because the math only works on minimal output and because every crystal spending will reset the number of runs you can get the total number of free runs you can get might differ depending on the surplus stamina you gain from the spending. This means that you have to repeat the math after every spending preferrably to calibrate your data.

3 On the last few runs, react to minute details
I don’t see a lot of players doing this most of the time, but for my case I do. Due to the minimal output prediction you might come to a situation where you can actually save a crystal because the extras you get is enough for you to hit the target without having to farm your target map, but another map with a lower surefire drop. For example you target 1000 items and going into the last run you are at 994, at this point you ran out of stamina and notice that by naturally waiting it to recover you will only gain 5 stamina before the event ends. At this point you can either spend the crystal to get 1004 minimum, or farm another map that drops exactly 6 items but cost 5 stamina to run. While situations like this don’t happen often when it happens it is a matter of 1 crystal which is huge for a free player.

Vampire’s Bride is a collection event, where you farm for collection items up to a certain amount to unlock a Princess reward unit and upgrade her. Story is same old same old. Crisis on vampire village under monster attack bla bla bla. Have a look at it if you are interested when the event rolls out.

The Unit: Vampire Princess/Immortal Princess Karma

Depending on the number of collection items you can get, your reward will either be a Platinum Vampire Princess or a Black Immortal Princess Karma. Her stats are pretty impressive for a free Princess; Platinum or Black wise, Karma will be a major tactical unit for most of the players for quite a long while. The unique part of Karma is she cannot be healed. This is a double-edged sword; an unhealable unit can only last so long on the field despite Karma being compensated with a pretty handsome HP pool, but on the bright side this means that she can be deployed in a healer range yet will not distrupt the healer in her healing duties in situations where you suffer multiple damage sources. At this stage of the game however you can expect Karma to be able to tank up quite a while given her impressive stats and her status being a princess with high attack stat means that she can easily burst down monsters without having to take too much damage unless its a boss.

The difference in skill between a Platinum and Black Karma is huge as well. The additional undead duration status given to Black Karma (she will not die during the duration despite suffering damage that will kill her) means that she is the ideal tank not only for hard maps like Immortal Beast, but extremely useful to berserk monsters like the giant and mage mummies which will come later in the game and can absolutely one shot your better tanks when on full berserk mode (talking about 2000-3000 attack).

Overall, a high priority unit that you won’t get after a while from events.

Map Preview:

There will be 8 maps going into this event. You will see zombies, werewolves, vampires, lich and the usual goblins, black armors, wolves.

The difficulty with this event isn’t exactly on the monsters; you can clear everything if you can handle Castle Retake just by looking at the monsters themselves. It is very different though with the introduction of paralysis, which can be pretty game changing.

Aigis runs various versions of Paralysis in the game; the one on Vampire’s Bride is probably the easiest to handle of all of the known versions so far. This version typically silence your character; paralysed unit cannot attack, and suffer defense reduction by about 50%. The good side is your unit passive is still active; they can still block, evade attacks and their skill cooldown timers still function.

Paralysis will only occur when a monster equipped with the skill successfully hits your unit between 4-6 times. This stacks across different monsters with the same skill, but does not count when the target is under paralysis. This is the single reason why Rogues are considered highly useful in this event; their evasion is a passive so it cannot be stopped by paralysis, and because of the evasion they are less likely to be paralysed.

Future paralysis will see more unforgiving situations; there are paralysis that completely destroys your unit block and allows monsters to just walk past as if your unit isn’t there, or paralysis that completely turns your defense to 0. It is therefore important to know how paralysis works, which paralysis is in effect and organize your team accordingly to deal with each situation.

Regarding individual map difficulty, there are 2-3 maps worth noting, being 4th, 7th and 8th. 4th map is tricky because if you exhaust a lot of your units early you will find yourself in deep trouble handling the last extended goblin rush that is spearheaded with zombies aiming to paralyse your tanks allowing the rush to breeze through.

Map 7 requires facetanking a vampire which isn’t a big problem until a valkyrie also comes in. With Paralysis in effect the valkyrie can hit really hard on your tanks.

Map 8 is all about juggling the lich and quickly destroying the armors and vampire. Dragging will require significant amount of resources that some players won’t have so thread carefully on this one especially if you are aiming for the Black Karma since this is the most reliable map to farm.

Drop Rate:

I won’t post the drop items since this will definitely be up on the wiki soon enough. It is important to note that collection event is not an event where you want to farm silver units if you have the capability to max out the reward unit. I wanted to touch on the vials of blood plasma drops from this event on each individual map. There are 3 types of plasma drops overall; 1 vial, 3 vials, 10 vials. 1 vial drops on maps 1-6, 3 vials drop on maps 4-8, 10 vials drop on maps 7-8. The maximum drops across 8 maps are: 1,2,3,5,5,7,16,16. This is assuming a 100% drop rate.

Team Preparation:

This is an event that have seen various team preparations being viable, but some units are indispensible. Mages, for one, is totally necessary for this event unless you get the Summons Crossbow units that will be introduced alongside this event with their 1.5 attack bonus during the event. If you are running Mages then Soldiers are also pretty important as the UP cost will be really tight considering the monster spawn duration.

Apart from Mages, the usual units that will see a lot of up time are: archers, healers, heavy infantries, witches, valkyries, bandit. Again I will be trying to use these free units to help out players who missed the previous dragon events, but if you have Echidna she is pretty useful as well. Also rogues can be tremendously helpful in clutch situations particularly against leaked monsters in a rush or simply zombie clears. I won’t be using them though unless absolutely necessary; my prejudice against rogues would mean none are useful to me at the moment anyway since I don’t train them at all.

A couple of viable/preferrable approach I can think of right now:

Formation 1:
2 Mages both CC
2 Witches both CC
3 Healers 2 CC 1 can be non CC
2 Heavy Infantries both CC
1 Valkyrie CC
1 Bandit CC is better than non CC
2 Archers both CC
1 Soldier (Katie CC)
1 additional backup, can be another soldier for UP, rogue for clutch situation handling, or another auxiliary depending on which of your units non-CC

Clue: You facetank everything. With the above setup bruteforcing up to map 7 is totally viable. Map 8 will require you to destroy the Vampire first by running Bandit with Risk Life from the start to quickly mow him down to less than 50% HP so he won’t be a factor later as the lich spawns while he hit your last range area. Then 2 healers at the first range area with a Valkyrie tanking the lich, just like how you deal with dragon mage in Dragon Princess.

Formation 2:
2 Mages both CC
2 Witches both CC
2 Healers both CC
2 Heavy Infantries both CC
2 Valkyries both CC
2 Archers both CC
1 Bandit CC
1 Soldier (Katie CC)
1 additional backup.

Clue: This is a bit riskier because of Map 8. For prior maps it is the same as Formation 1. In the case of Map 8 because you only have 2 Healers chances are you will be dropping one at the last range area to cover the damage from the Lich when he spawns and another one at the first range area where you deal with him once and for all. The problem with Lich is their attack speed is slightly faster than your healer so they will out DPS your healer at one point. This is why having another Valkyrie is important because you absolutely have to kill him at the first range area running this formation or you will be exhausted of resources to deal with him at the second area.

Anyway the above are free formations. For premium formations you have more options: Crossbows are huge on this event not only because of their bonus attack but their attack speed making them super useful against the rushes. Berna can facetank the Vampire easily if you have her, while Sybilla is just Sybilla doing her things. Nanaly is another alternative for rush clears. Platinum units wise Maribel is pretty good for steroid tanking but you need to time her skill properly since paralysis will nullify her hard. Other units will just be the same as free units with better stats making your life easier in managing the maps. Also keep track of the Mages according to their skills; some are good to burst bosses, others are better with AOE for rush.

Also I know that the free formations are pretty overwhelming; even I don’t have everything in place at the moment (no CC bandit/2nd CC Heavy Infantry/2nd CC Mage). I will try my best to score everything, hopefully it will work out.

Other Important Stuffs:

1) Crystal Expense Predictions
I wanted to highlight this because I have seen the calculations and predictions on Crystals required to get 700/1200 vials for this event on Wiki. I don’t know where this comes from, but if it is from the Japanese Wiki without understanding the context behind the measurement then it can be really misleading to the players.

In JP it is hard to predict a lot of things because there is just not enough data when the event is newly released; you don’t know the drop rates, you don’t know the map difficulties to you at the time, you don’t know how useful the unit is to benchmark effectively.

For Karma, we know the estimated drop rate, we know how strong this unit is, we have a rough expectation on the challenges of the map and can roughly guess at what level can we clear. But we still don’t know how this event will be rolled out, which is the biggest factor in the measurement.

When JP release events that contain more than 5 maps they usually don’t release them all at once. In this case when Karma is released the event maps were split into 2 weeks, where map 7 and 8 were released 1 week into the event, 1 week until the event ends. This means that back then players can only farm map 8 on day 8/14 of the event, and I strongly suspect the data on the Wiki is predicated from this scenario if it is not pre-filtered.

This is different on EN however. When Nutaku released Dragon Princess all 9 maps were out since day 1, contrary to JP where the maps are split as well. If the same is going to happen to Karma, then players can effectively farm Map 8 right from the start of the event. Granted we won’t know if Karma is going to be 1 week or 2 weeks (If it is 1 week it is slightly worse than JP in crystal consumption) you can expect to have a much more forgiving crystal expense than JP overall if all maps are released on Day 1. From another source I have seen you effectively save up to 12 crystals overall at lv120, more at higher levels if this is the case.

Based on this situation where different predictions rise every time a context is added or removed it is important that players understand how predictions should come in. A benchmark on crystals should be set at 40-45 as a safe zone prior a collection event because even in JP so long you do things appropriately you won’t spend more than that usually. Realistic expenses can only be measured once you are into the event because too many factors will affect the outcome; your ability to farm better ratio maps, your luck in scoring most drops out of it, and little mistakes or issues like levelling up refilling charisma and stamina etc or failing a map. Pre-event crystal prediction isn’t going to help you much; rather most of the time it discourages players to commit which kind of defeats the purpose of the prediction in the first place.

2) Vial Targets
It is generally conceded that you cannot get Black Karma unless you spend Crystals or you have that kind of inexplainable luck with RNG. Once the event starts you want to try and reach the furthest map as possible; Map 6 is probably the starting point where you break even in consistency. The difference between Map 7 and 8 is huge as well. While both maps drop 10 vial packs, map 7 has about 45% drop on that pack. Map 8 is 100%. Also if I recall correctly the Vampire is the monster that drops the 10 vial pack, so even if you cannot 3 star Map 8 you can still farm it with 1 star and kill the vampire plus a couple of zombies for the 3 vial packs.

For players who struggle to clear map 4, it is probably more realistic to target 700 as end goal. If you just started and absolutely cannot build up a formation capable to go through Map 4 at all then a Platinum Karma is probably the realistic target and store up the Crystals for future use. Post 700 is really up to you. I have known players who spend strongly until they reach 700, then just farm casually and see where they end up on the ladder. If you want 13 second invulnerability and easy skill awakening later then aim for 1000 instead. Either ways at 700 you are guaranteed 11 seconds of invulnerability.

In the case of Nutaku releasing the map in splits, you can either farm the maps if you are confident enough with your formation, or farm the maps over the weekends and do the dailies instead to powerboost your units that are not ready for the later maps. The drop rate of the first few maps were just so bad that it probably isn’t worth it at all to consistently farm them unless you are absolutely sure that you cannot do the later maps at all.

3) I Couldn’t Hit 700. Sadface.
Karma has been recreated once before Christmas 2014 on JP. In this recreated period Karma is available for exchange with the event crystals; 300 for Black, 150 for Platinum. This is the only time at this stage for players to get 2 different copies of Karma for their collection. It also means that you still have a chance to get the Black one, albeit at a pretty weak state in terms of her skill. Also note that while both Karma copies bear the same name, they run different titles and skills so nice try on trying to use a Platinum Karma to skill level or cost reduce a Black Karma.

Conclusion:
New player or not, this is the first collection event you will experience, and if Nutaku don’t ninja with the devs so hard it will be the collection event you get to experience for a long while. All I can say is try your best really. There are plenty of positives to take from this one, so long you look at the bright side. Personally I am a bit doubtful on my ability to clear all the maps at this stage with only free units, but well you won’t succeed if you never try, right?

Okay, I am just bored.

Lets look at the 5 different event missions that players will encounter at the course of the game, their nature and importance as well as unit rewards and my take on these missions overall.

1)Farm Event

Farm events are straightforward events that reward you the signature unit by farming relevant maps. You can expect most of the signature units to be Platinum in rarity. In most cases you are guaranteed a 100% first drop, of which subsequent copies are subject to the maps’ rate, with the last map usually giving the highest drop rate.

Farm events are considered the most common event in Aigis; they generally show up more than other events in frequency. They are vital in a sense that they provide a 100% base Platinum to free players to work with, and while it is counterproductive new players can actually farm easier maps for drops compared to cases like Trial events where you need to achieve certain level of progress to enhance the signature unit. However, it is also because of this frequency that signature units from Farm Events can either be an extremely niche unit that won’t find a lot of up time, or they can be very strong. It is also one of those events where luck plays a huge part to your success; because it is a drop rate based event, it is absolutely possible for a lucky free player to train a signature unit better than an unlucky cash player, albeit less likely.

A recreated farm event usually functions the same as its original counterpart except that certain secondary drops will be replaced with the copy crystals used to exchange copy event units that are mostly Trial or Collection event rewards.

My take: For a free player targeting specific farm events to cash on Crystals can be considered a good choice, while for other low maintenance units that already displayed their optimum potential at base stats it is probably better to save the Crystals for better events. This can also hold true for cash players; some units are going to be more aesthetically valued than others, while selected few will turn up incredibly worth the penny. Also it is interesting that while most Farm event units can be really strong at the time when they appear, their usefulness will gradually decline as the game progresses and better units or unit types are introduced. Unless they are resurrected by future contents like Skill Awakening expect these units to fall off from your formation after some time. When deciding whether to fully commit in a farm event or not you want to consider 2 things: The overall usefulness of the unit and the probability of getting a decent amount of the unit copies to strengthen them. If you feel that you cannot achieve either one of this conditions then don’t spend the crystals.

2)Trial Event Trial events are challenge events. It comes with certain goals to be met in order to obtain and enhance the signature unit(s); there can be two signature units at the same time, usually 1 for star challenge while the other is rewarded on mission count challenge. No signature unit copies are dropped from the mission; your performances during the event decides how the signature unit will be like when they are rewarded to you after the conclusion of the event.

Most trial event units are useful; They can come in Gold, Platinum and for some situation Black, and in most cases will last quite a while on your team. Despite some of them being niche in strategical use most will be in the more familiar form of units that you will widely use on a daily basis. Most people won’t find themselves needing to spend crystals to complete the challenges, though the trial protections can help out a lot, especially if you consider that the number of resources you need to commit for not being able to enhance a trial event unit to their satisfactory level later via Spirits will be more expensive than the crystals spent on protections.

A recreated trial event usually will see the event units being placed in the Trading Post, requiring a special copy crystal that you can farm like a collection event during most of the recreated events.

My take: Trial events can be considered the easiest event to judge because you can actually measure your reward. In deciding crystal spending you don’t want to spend more than 10 in any situation; a lot of times your problem with accomplishing those challenges can be easily fixed with spending more time on strengthening your team instead of repeatedly trying to do the missions. When I joined Nutaku’s version I am a level 1 Prince with 0 cash purchases into the first day of Ryujin Invasion and still managed to complete all the challenges 4 days before the event ends, notably spending 5 crystals for the videos to be uploaded earlier since I knew I can definitely still complete everything on the last day. In situations where you have to spend more than 10 crystals and you are playing free concede that it is an uphill task and try to ace it over on the last couple of days. If that still couldn’t pull you through it would be best to stop trying and focus on building your team instead. However the best scenario is to not spend a single crystal to do all the trial missions; they simply are those missions that can give you free crystals without you spending them back on the event.

3)Collection Event These events are crystal vacuum cleaners; they suck hard into your pockets for the crystals you treasure so much. Yet in most cases again by measuring the resources you need to commit to train the signature units in Spirits these crystals are usually spendable, considering that in most scenarios you are looking at useful Black unit rewards.

You are farming event items that determine your reward unit’s strength in levels, skill levels and cost as well as whether you are even eligible for the reward unit at all. The event is designed in such a way that you almost will never be able to fully max the unit without spending more than 20 crystals down the road. However, in most situations as well you will be able to get the base unit without spending a single crystal; typically for a free player it is like getting a Black unit without having to spend 5 crystals on summons. Typically the event items drop in different numbers and will drop more at later mission maps; I use the term later instead of difficulty because some times mid tier maps are actually harder than the boss maps of an event such as Vampire Bride (Karma spoiler!).

Recreated collection events see the same setting as trial events; the units are dropped into the Trading Post for copy crystal exchange. At this point it will probably be obvious that these copy crystals also require good management from you as a player just like how you will have to manage your Demon Crystals, except that they are harder to come by and hence more precious to a point that some players do spend sacred crystals to farm them during recreated events.

My take: I’ve seen a lot of skepticism on Collection Events, but this is the event that I like the most as they not only give great units, but also are giving you an option from a free player’s perspective to buy a good Black unit that otherwise would cost you an arm and a leg in trying out on summons. Look at it this way: you are essentially buying a Black unit for a number of crystals to completely reduce their cost and max out their skill levels. Even if you are spending 40 crystals for one maxed out Black it is a really good investment. An example: You spend 40 crystals to get a maxed out Black Karma at skill level 5 and -5 cost reduction. Lets imagine that Karma is a summons unit; you will only be spending less crystals if you get 5-7 Karma copies in a row, have a window of failure to cost reduce and skill up to 2 times. With a 3% summons rate on top of a 100% need to score Karma every time plus the approximately 5% success rate at level 4 to 5 skill up, good luck in getting that kind of RNG rolling for you. Granted that back-to-back collection events will kill a free player totally, at least that has never happened in JP, so I would want to assume that it won’t happen here as well.

4)Great March Great March are extended missions that can last for a very long time because of the number of monster spawns. Depending on the event you can be doing this for 2 weeks to a month. Usually with the launch of Great March you can expect SP crystals to be introduced in the game as well; these are crystals that gives you a slightly better summons rate than the 2000G summons, costing 5 crystals per summon. They are the main reward item from Great March events.

Unit rewards from Great March can come from 2 directions; Either they are rewarded directly by completing certain difficulties, or it is a server effort. Let’s look at this at a lower level. There are 3-4 challenges that comes with a Great March, usually 3. The first challenge is a cumulative monster kill count; for every x amount of monsters you killed SP crystals are awarded, usually starting from every 100 to every 200 when you achieve 2000 total kills and so on. The second challenge is also a cumulative monster kill count; this time it is at a fixed rate usually starting at 1000 and ending at 10000 kill counts. The rewards are usually in the form of Daily Mission rewards, most of the time the Armors from Monday and Spirits from Tuesday/Friday dailies, with rare Demon Crystal rewards as well. The third challenge is a difficulty challenge where you get a one time reward for killing x amount of monsters in one go. This is where unit rewards come in, though they are usually units you get from summons or farm-able unit drops during other events, with daily mission rewards in the mix as well. The fourth challenge is a global challenge, where cumulative monster kills of the whole server are tabulated to unlock a signature unit, enhancing the unit every time a tier kill count is achieved. For example, the Gold Pirate Mouret(?) is a signature Great March event unit, failing to turn to Platinum because the last tier of kill count challenge is not achieved. She is now available for exchange in Trading Post with Demon Crystals after the event ended couple months back.

My take: Great March is like an extended daily mission; you will only be spending Charisma on these missions so they are usually seen as by-missions for players who have excess Charisma to spend during an urgent mission period, and the experience gauge is too big to farm story missions. Not a good place to spend crystals especially when there are no star rewards for these missions, meaning that there is no crystal reward. Units can die in these missions and won’t affect your rewards; monster kill count is all that matters. You will want to try and score the second challenge though; they usually reward really good spirits like the Rainbow and very rarely the Blessing.

5)Gold Rush Gold Rush is exactly what it means: Gold unit Rush. The nature of this event is that every day a new map will be added to the event tab usually featuring a Gold bonus unit when you score every drop. Granted that it is usually a 3-drop map with one or two rare drops it is exceptionally hard for a free player to score every map’s bonus. This is compounded by the fact that the map are released daily until the last day of the event expect the last map to feature extremely useful drop/Gold bonus units to wring your pockets dry as you spam crystals to score it.

Recreated Gold Rush functions the same as its original counterpart. In fact Gold Rush is just like another Farm event, only the way the maps are rolled out is different, and that in itself is a huge difference in spending crystals or not.

My take: Think twice before you spend. As far as I know smart players usually don’t spend crystals on Gold Rush for the bonus units unless they only have the silver variation of the unit type or the Gold unit is worth as much as a Platinum for example. Instead, most of the time crystals are spent to farm the drop units, which can in some scenario be a Platinum event unit. Only spend if you have a specific target in mind, and even if that is the case try to score the map without spending first. Usually getting 3 scored maps from a Gold Rush period is considered decent for a free player.