Is this Yoimiya and AoE content? YES!
Yoimiya is built full EM, Beidou in the team helps remove burning aura from the enemies and further provides defensive utility (at C1+) with additional damage via enabling quicken and overload, Kokomi is the hydro option and her healing makes this team possible in the first place.
This is something more of a cursed build and isn't supposed to be meta defining. If you want to have faster clear times, less restrictive rotations and more defensive utility just go full EM Thoma.