Thoma build guide

Thoma

Thoma functions as a support character that specializes in providing shield for team. Despite early opinions on his role, his low base attack, damage multiplier, talent ascension and constellation all point towards him being built as a shield bot and not an off-field DPS. He will be the second best shielder in Genshin losing only Zhongli due to his 4 star rarity. With optimal build, rotation and constellation, he can have a 100% shield uptime. Thoma’s biggest issues are his high 80 energy cost of his Burst (Q) and standard ICD (apply pyro every 3 hits).

Shield bot Thoma

Similar to most shield build, a shield bot Thoma would focus on HP and ER% stat to maintain a strong shield with good Burst (Q) uptime. As a Sacrificial polearm does not exist, potentially a Favonius polearm would be his BiS weapon to address his energy issue. Artifact wise, 2 piece Tenacity of Millelith 2 piece Emblem of Severed Fate would help to buff his shield and ER requirement. For team comp, he works really well in a Hutao comp as he can provide pyro resonance and shield to Hutao. It also means that the Hutao comp can easily run a VV shred to give further pyro damage boost. Rotation would look something like below;

Thoma E/Q -> VV shred -> Xingqiu Q -> Xingqiu E -> Hutao combo

Hutao
Xingqiu
Thoma
Sucrose

Its important to note that his Q has standard ICD (apply pyro every 2.5 seconds or every 3 hits) meaning that he WILL steal some of some of Hutao’s vape charge attack but the difference is marginal.

Talent

  1. Skill (E)
  2. Burst (Q)

Weapon

  1. Favonius Lance (4✩)
  2. Engulfing Lightning (5✩)
  3. The Catch (4✩) [R5]
  4. Prototype Starglitter (4✩)
  5. Skyward Spine (5✩)
  6. Black Tassel (3✩)*

Artifact

  1. Noblesse Oblige (4)
  2. Tenacity of the Millelith (2) Emblem of Severed Fate (2)
  3. Emblem of Severed Fate (2)
  4. The Exile (2) Scholar (2)

Main Stat

  • Sands – Energy Recharge / HP%
  • Goblet – HP%
  • Circlet – HP% / Crit Rate*

Substat

  1. Energy Recharge
  2. HP%
  3. Crit Rate*
  4. Flat HP

SUPPORT

Thoma ideally wants to focus on shield over damage, and his burst uptime is required to achieve better shields, which is why he needs ER% on top of HP%.

Regarding Weapon Choices:

Black Tassel: At [C4], Thoma gains 15 energy when he fires his Elemental Burst. This effectively reduces his energy cost to 65 and makes it possible to use Black Tassel with ER sands instead of ER weapon with ER sands to furthermore strengthen his shield.

Regarding Substat Choices:

Crit Rate is an option when using Favonius Lance.