Beidou excels as an off-field Electro applicator whose burst damage scales with her own HP and benefits heavily from being on-field briefly to counter with her skill. Pair her with on-field carries like Fischl, Xingqiu, or Hydro/Pyro DPS to enable consistent Electro reactions. Build for Energy Recharge and HP priority, with Electro Damage Bonus substats, and use a crit-focused weapon like Serpent Spine or The Bell for survivability.