Barbara works as Xiangling's on field Vaporize enabler and heals the team. She deals damage too, if 4pc Ocean Hued Clam is equipped.
Xiangling acts as the Main DPS through her Burst, profiting from Bennett's ATK Buff, Sucrose's shredding and Barbara's Hydro application.
Sucrose gives free Elemental Mastery to the team and enhances reaction damage, as well as shredding elements with 4pc Viridescent Venerer.
Bennett's utility consists in providing a huge ATK boost to the team as well as Pyro resonance. He can't really be replaced as his contribute is unique.
Barbara works as Beidou and Kuki's on field Electro-Charged enabler and heals the team. She deals damage too, if 4pc Ocean Hued Clam is equipped.
Beidou covers the Main DPS role and provides constant Electro application. This team is focussed around maximising Beidou's Electro-Charged DMG.
Kuki Shinobu provides healing and, if equipped, Tenacity of the Millelith buff, as well as extra particles and more Electro application.