【FGO】Double Castoria System Compatible Servants Tier List (July 2022 Addendum)【Fate/Grand Order】

It's been 2 years since Castoria release in JP, so it's once again time to update my Castoria Tier-list, before the meta is changed again with 7th Anniversary.
Only contains Servants released from Summer 2020 to June 2022.

Link to the 2020 Tier List vid:    • 【FGO】Double Castoria System Compatibl...  

Criteria is the same as last time:
Strictly for 3 turns farming.
Assume 3/3/x for enemy composition.
For non-Berserker/Extra Servants, assume counter-class first unless otherwise noted (very important for both damage and refund).
No Plugsuit/Arash/Habetrot. Other Mystic Codes are fair game.

Some slight update:
Append Skill is taken into consideration.
Top Tier now divided into "Top Tier" & "High Tier"
Top Tier: Able to use Black Grail to farm even Berserker.
High Tier: Able to use Black Grail to farm advantage class and neutral class

And here is the list, in chronological order.

Summer Kiara: Mid to High Tier
The first SSR Art AoE Servant released after Castoria, and became a victim because of it. It's pretty clear DW realized what a mistake Castoria was and really overtuned Kiara's numbers.
Despite being shown using a Black Grail in my demo, a combination of below average NP gain, conditional battery & debuff-reliant damage make her very frustrating to use, even at high NP level (as you can see, mine is NP5).
Append skill helped her usage somewhat, but it was a bit too late in JP timeline as she had to compete against Summer Kama & Space Ishtar by that time. She probably will fare better in NA thanks to early append access.
Fish is definitely usable, even High Tier with enough investment, but I would not recommend her in good faith.

Summer Tomoe: Mid to Bottom Tier
The worst victim of DW trying to rein in Castoria's power and then released you-know-who a few months later. He screwed Tomoe over harder than Yoshinaka ever could.
Farming wise, she is probably the worst Art AoE Servant released in the last 2 years, and the only one coming close to bottom tier in this vid. Would not recommend.

Vritra: High Tier
Expensive Summer Melt, but worse. And permanent.

Muramasa: Top Tier
The man, the legend, need no introduction. Amazing in both farming and challenge quest.
50% Battery combined with Append skill meaning he has access to the Space Ishtar 3T script (using both Castoria S2 and his battery on T1, then topping off with Castoria S1 for T2 and T3)

Percival: Top Tier
Summer Melt, but permanent. His damage is on the lower side but he more than makes up for it with his incredible refund and amazing skillset for challenge quest.
Uoh-

Habetrot: Top Tier
Massive battery, passable refund and incredible utility in all contents with her S3.
XP-chan is the best "free" Art AoE Servant we have and worth every FP you spent.

Summer Kama: Top Tier
Sakura-flavored Space Ishtar. The two are almost interchangeable at equal investment, with a slight edge to Space Ishtar due to Summer Kama's debuff-reliant damage.

Zenobia: High Tier
Permanent (and cheaper) Jeanne Archer. Unlike Jarcher, she'll struggle with Berserker and neutral farming due to her average refund and low damage, so don't shelf your Jeanne yet.

Ranmaru: High Tier
F2P Space Ishtar, but worse.
Still an excellent omni-farmer Servant due to being welfare and automatically NP5 with access to append skill.

Ryouma Lancer: High Tier
Expensive Summer Melt, but worse. And limited.

Taisui Xingjun: Mid Tier (High if vs Caster)
F2P Kiara, but way worse.
Would not recommend using him to farm anything but Caster, and MAYBE Rider.

Mary Anning: Mid to High Tier
Jason but Lancer.
Serviceable refund and some utility as a low cost Art support. Like Jason, will obviously need Grails investment if you want to farm anything with her.

Moriarty Ruler: Mid to High Tier
Below average refund and low damage if not hitting the correct trait.
Usable with enough investment, but don't expect anything near Space Ishtar-tier performance.

Kyokutei Bakin: Mid to High Tier
Below average refund, but you generally want to use her against Caster anyway so it's less of a problem.
Old man in cute girl body (plus or minus ymmv).

Disclaimer: As usual, this tierlist is heavily based on my own experience with the game and was made mostly according to my own criteria to improve my convenience during farming. Don't let me tell you how to play the game, adapt and improvise.

Oh and one last word...

Caltria

Timestamps:
0:00 Summer Kiara
2:35 Summer Tomoe
4:31 Vritra
6:40 Senji Muramasa
9:01 Percival
11:10 Habetrot
13:16 Summer Kama
15:17 Zenobia
17:21 Mysterious Ranmaru X
19:33 Sakamoto Ryouma (Lancer)
21:49 Taisui Xingjun
23:55 Mary Anning
25:57 James Moriarty (Ruler)
28:15 Kyokutei Bakin

#fgo