Table of Contents
Intro
Collection Items is a new feature in the game that has been introduced an update in May 2024. Collection items give a lot of stats, and bonus effects that are unique to every class. These items can be acquired my clearing main missions (one-time), Solo raids, and monthly dispatches.
This system is in-place to make end game grinding a bit more… creative ✨, as this system is also very reliant on luck, similarly to the overload system.
Dolls are PERMANENTLY stuck on a Nikke once they have been assigned to one.
What are Collection Items?
Collection items are dolls that increase your stats by a fair margin, while also providing unique buffs to different classes. The stats increased are HP, Def, and ATK. These dolls are also great in simply increasing CP, which helps lessen the negative effects of CP deficit
R Dolls Stat/lvl

SR Dolls Stat/lvl

Unique buffs explained
Some terms are worded awkwardly and can be easily misunderstood, i’ll explain these buffs in detail, with a “priority guide” for each weapon class.
Where to get Collection Items?
Collection Items are first acquired when clearing campaign 6-4 Normal. These are later consistently acquired in dispatch missions and solo raid completions (First time completions).

How do you put on Collection Items?
The Commander can put on Collection items from the Nikkepedia Menu.

Collectibles from Tactics Academy (+ Re-rolling)
Collectibles can be first acquired from dispatch when learning lesson 5-4 from the academy. the rarity of items found in these special dispatches will be improved at lessons 11-2, 11-3, 12-2, 13-2, and 13-3. These dispatches differ from the normal dispatches and will have their own pool, maximum of 5 special dispatches at max academy level.




Leveling up Collectible Items + Guide
It’s pretty easy to slap any types of kits into dolls at the start, but that’s probably a bad idea as there’s heavy RNG involved. The Commander wants to reduce the RNG as much as possible or they’d pretty much be stuck at doll levels for long periods of time, ESPECIALLY for SR dolls.
Super Success
There is a system called Super Success. Super success grants a chance to skip levels. There are 15 phrases in each doll, and 3 “checkpoints”. Super successes immediately take the doll to the next checkpoint, and the levels skipped will depend on what level in which checkpoint the doll is in. Checkpoints being 1-5, 5-10, 10-15

R -> SR Doll Exp Transfer
It is mathematically optimal to level up R dolls first (if applicable) to phase 15, then upgrade it to an SR doll. This is because R dolls have a higher odds of super success in proportion to EXP needed. A fully upgraded R doll will convert to a phase 5 SR doll.
Leveling up Guide
We mentioned previously that it is mathematically optimal to level up R dolls first, then transfer convert the EXP when SR doll are acquired. Since Elite Maintenance kits are sparse, it is recommended to save them for SR dolls. The recommended usage of kits per doll/lvl are as follows:
R 1-14: Strictly Blues
SR 1-10: Blues/Purples
SR 10-13: Orange
14: Blue/Purple/Orange

Super Success rates are horrid at later SR doll levels, which is why it is recommended to save Elite Maintenance kits/try to acquire a lot of them from dispatches.
How To unlock Treasures + What are Treasures
Treasures (favorite items) are unlocked when a SR doll is maxed out (Phase 15) and the Nikke has a treasure option available. Converting SR dolls to treasures require no special mats, however upgrading treasures will require special mats found in special dispatch and solo raids. The Nikke in question needs to be bond level 30 as well, which means 2 dupes are needed.


After upgrading the doll to SR rarity and level 15 as well as having bond level 30, the doll screen will look like this.

After starting the favorite item mission, a screen will appear to guide the user to the tasks. Usually those are primarely outpost encounters with 1 to 2 combat missions on the surface.
Completing all missions will unlock Phase 1 of the favorite item, without spending a single resource. Afterwards, the item can be upgraded without any additional missions, only using favorite item materials.
Phase 1 -> 2 = 50 item materials
Phase 2 -> 3 = 110 item materials
Current Characters with Treasures
| Nikke | Upgarde Material | Release |
|---|---|---|
| UV Vacumn Cleaner | Season 1 | |
| Train Track Set | Season 1 | |
| AA Batteries | Season 1 | |
| Super Ultrafine Fiber Cleaner | Season 1 | |
| Old Phone Charger | Season 2 | |
| Special Coating Agent | Season 3 | |
| Scouring Pad | Season 3 | |
| Duster | Season 3 | |
| Preservation Finish | Season 3 | |
| Sandpaper | Season 4 | |
| Sticky Notes | Season 4 | |
| Shoe Cleaner | Season 4 | |
| Fountain Pen | Season 4 |
Misc Info
Solo Raid Economy (First Attempts + Repeated Attempts)
This is the Economy of Dolls/Kits acquired from Solo raid, which happens once a month. This is under the assumption the player can complete all levels.
- 6 random R dolls
- 2 random SR dolls
- 1 SR doll Selector
- 30 Random Favorite Maintenance Items
- 12× Maintenance Kit Box I
- 17× Maintenance Kit Box II
Mileage Shop
The mileage shop rotates between characters who have treasures (S1). There is also a Favorite Item Season 1 Nikke Selection Box that uses gold Mileage, HOWEVER these do NOT give the treasures, just a base copy or dupe of said character.
The option that uses ordinary mileage tickets are only for BODIES (dupes), and will not give you the base copy of shown Nikke.

Doll Priority
Priority on which dolls to get first when excluding Treasures. This assumes complete box.
- Sniper Rifle Doll – A lot of Meta DPS’s are snipers, Extremely strong buff
- SG / RL Dolls – Strong buffs, and each weapon type have Meta Nikkes respectively
- AR Doll – Realistically, only Snow White benefits from the Doll’s buff, Lower in Priority if SW has a doll already or the player lacks Snow white
- MG Doll – Rather underwhelming buff. This is due to Overloaded equipment offering the same buff, and the buff % itself is very low
- SMG Doll – Strong buff, but there are no Viable SMG DPS’s as of now. Pretty much just Liter CP padding for Campaign
Combining

4 R dolls are needed for a chance of it to combine into a SR doll. Realistically, expect Intermediate (20x) or Elite Kits (10x)


3 SR dolls are needed for a doll selection box.















HI,
nice informative blog!
I just wanted to point out the section for AR core damage has a picture for SR instead.
Gracias por la guia pero los muñecos se pondran en cualquier SSR Nikke cualquiera por ejemplo pondria a Red Hood, o Litier, Crown, cualquier Nikke Por favor me ayudan a entender esto por favor gracias
gotcha so the doll reroll/combine is a recycle not a upgrade system that makes more sense. Glad they had the forthought unlike the 9000 battle data set cases.
Do you need another R copy of the same weapon type doll to upgrade a max level R doll to SR doll ? I have a max level R doll but can’t upgrade it.
That’s not the way it works. You have to REPLACE the R doll with a SR doll, which deletes it. Any EXP transfers over, so you’ll get (as noted above) a level 5 SR doll.
All dolls are permanent, but you can replace a lower rarity one with a higher (you don’t get it back, it gets magically transformed into EXP)
Thank you for the math at the end, that’s literally what i came here hoping to find. Knowing it’s statistically better to get a R doll to 15 then bringing it to SR is what i wanted to know. The super success rates have me really pessimistic about this entire ‘upgrade’ system.
But hey, Viper just got her special one released, which makes me happy as she was my first 7* max character (completely without wishlist too, ALL from gold molds!)
Question, for the SR Sniper dolls: I know this was made before the Juvenile Days event, but could this work particularly well for Ein? Her Near Feather ability makes her a very good DPS in my opinion, but I wanted to hear from other players.
This guide needs to update treasure characters list
Will this page be updated for the current series of Treasures (Drake et al) or will a new page that goes into more detail be created to explain Treasure priority amongst the whole cast and in depth details of what the treasures change?
we gonna update this now that it’s two sets behind?
Nayuta is now arguably a good recipient of a SMG doll.