Kaeya excels in freeze teams, applying Cryo consistently off-field while his Elemental Burst provides energy sustain. Pair him with a Hydro applicator like Yelan or Xingqiu and an on-field carry that benefits from freeze. Build with Energy Recharge and Cryo Damage, focusing on artifact sets like Blizzard Strayer or Noblesse Oblige depending on team needs.