Kazuha excels at amplifying team damage by converting his Elemental Mastery into bonus damage for the team's chosen element; he is particularly effective in reaction-based teams where teammates trigger frequent reactions. Pair him with a strong on-field carry that applies an element consistently (Hydro, Pyro, Cryo, or Electro) to maximize his buff. Build with high Elemental Mastery and Energy Recharge, prioritize the Viridescent Venerer artifact set for elemental shred, and consider weapons like Iron Sting or Xiphos' Moonlight to further boost his Elemental Mastery scaling.