Castoria is the safest first pick for most accounts because she is broadly useful across Arts, Quick, and even some Buster setups. If your account is already heavy on Buster servants, Koyanskaya can move ahead, with Oberon coming after either of them and Skadi last.
What to Prioritize on the 25 Million Download Banners
Castoria
Altria Caster’s status screen displays her skill details and character stats. — ZTL
| Support | Main Strengths | Best for | Application Ease |
|---|---|---|---|
| Castoria | Arts looping, party battery, NP gain, attack, invincibility, debuff removal | Arts, Quick, Buster teams | Broad; gives value to most rosters |
| Koyanskaya | Buster battery, cooldown reduction, skill stacking | Buster AoE, single target with enough battery | Needs compatible Buster servants |
| Oberon | NP damage boosting, 50% battery, overcharge NP buffs | Farming and boss setups, damage ceiling | Ideal after main support is secured |
| Skadi | Quick battery, card buff | Quick teams | Least priority, situational |
Castoria's kit distributes NP gauge and attack buffs to the whole party, targeting Arts teams but aiding Quick and Buster setups as well. Her NP gain, invincibility, and debuff removal make her easy to apply across various team structures, including multi-attacker comps. She seldom demands that you already own specific servants or team setups, making her the strongest and most versatile foundational unit of this lineup.
Koyanskaya
Koyanskaya of Light’s status page shows Skill 1 and its cooldown reduction effect. — ZTL
When to pick Koyanskaya first
Choose Koyanskaya when your account already has Buster servants with at least 30% battery (50% preferred), particularly AoE or loopers, and you want to double down on Buster farming. Her cooldown reduction enables skill stacking, amplifying buffs and helping you cycle batteries and attack buffs more frequently. If your roster is built for Buster looping, she moves ahead of Castoria; for mixed or Arts-focused accounts, Castoria remains the safer pull.
Arts teams
The party setup screen displays multiple servants arranged across starting and sub member slots. — ZTL
Whether or not you have top Arts loopers, Castoria brings consistent NP gauge, NP gain, and attack support to any team. She is especially powerful for Arts damage dealers, unlocking their ability to refund and loop NPs, but her generic buffs are usable even when your roster is not perfectly optimized. Mixed accounts with Quick or Buster options also get reliable support from Castoria. If unsure which archetype your account favors, Castoria is still the safer and more universal pull than narrowing in on Koyanskaya.
Buster looping
Koyanskaya of Light’s status screen shows skill descriptions, including NP gain and Buster support effects. — ZTL
Koyanskaya's strength lies in her ability to enable Buster looping by supplying up to 50% battery per skill and reducing skill cooldowns—letting you double-stack buffs and keep batteries cycling. Servants with at least 30% (ideally 50%) battery and three-turn buffs are ideal partners. Without these pieces, she is harder to justify than Castoria; but if your account is already equipped with strong Buster loopers (like Morgan or Arjuna Alter), she is often the better first choice.
Oberon
Oberon’s servant page shows his skill list, including Evening Shroud EX and Morning Lark EX. — ZTL
Skadi
Also worth knowing
- Banner reruns: The campaign is expected to return with more chances to roll these servants, so missing one now may not be permanent.
- Quick support detail: Ruler Scathach-Skadi is viewed as the real Quick support to chase, but she is not available on these banners.
- Buster account synergy: Koyanskaya is especially strong for accounts with several high-battery Buster servants; for these players, she can be the best first pick.
- Oberon as a finisher: Oberon is strongest as an extra damage enabler after the main support is secured, not as the initial banner target.
FAQ
Which support should I prioritize first on the 25 million download banners?
Castoria is recommended first for most accounts, but Koyanskaya is best if your roster already has multiple strong Buster servants.
Is Castoria the best overall support to pull from this banner lineup?
Yes; Castoria is broadly applicable and works for most team types, making her the most universally useful pull.
When should I pick Koyanskaya over Castoria?
Pick Koyanskaya first if your account specializes in Buster servants ready for looping, especially those with enough battery to cycle NPs.
What kinds of servants work best with Koyanskaya’s battery and cooldown reduction?
Buster servants with at least 30% (ideally 50%) battery and skills that can be double-stacked are best for maximizing her support.
Why does the creator say Oberon is the cherry on top rather than the first priority?
Because Oberon amplifies NP damage after the main support is in place, serving as a bonus rather than the foundational piece.
Why is Skadi the least prioritized support in this video?
Skadi is more situational, and the top Quick support (Ruler Scathach-Skadi) is not on this banner, so she is best saved for specialized Quick accounts.
Sources
Screenshots on this page are frames from the videos below, used to illustrate the steps they describe. All rights remain with their creators.
- Which Support to Prioritize for the 25 Million DL Banners [Fate/Grand Order] — ZTL, August 25, 2026
