Thoma provides Pyro shields for the active character while dealing off-field damage, enabling consistent Vaporize or Overload reactions when paired with Hydro or Electro carries. Pairing him with a Hydro applicator like Yelan or Xingqiu amplifies team damage while the shields keep the on-field unit safe. Build him with HP% and Pyro damage, prioritizing enough Energy Recharge to maintain his Elemental Burst uptime.