Barbara build is the important part. You want her on full EM since she will be triggering most of your blooms. Fopl is her bis set, but you can Gilded or 2p2p EM, if you don't have a 4 piece for her, Nahida's set doesn't really matter, as long as you have Deepwood on someone in your team. In my case, Baizhu was on Deepwood so I put Nahida on more personal dmg focused build (Golden Troupe works as well).
Nilou Bloom team have very interesting build, somehow could full stars O_o
so Nahida GD Crit matter or Barb 4 Flower matter more ?
Barbara build is the important part. You want her on full EM since she will be triggering most of your blooms. Fopl is her bis set, but you can Gilded or 2p2p EM, if you don't have a 4 piece for her,
Nahida's set doesn't really matter, as long as you have Deepwood on someone in your team. In my case, Baizhu was on Deepwood so I put Nahida on more personal dmg focused build (Golden Troupe works as well).