Team for clearing 3 BP

Are you doing the 2 or 3 bp raids???

With a waver and tamamo you should be able to spam robins np really quickly, with both buff plus his poison he should do at least 800k with the event CE and have it ready again before the poison runs out, with that you are done with the 2BP one and get enough damage on the 3BP to make it worth it, try to let the hands live as much as you can, their fire atack does little damage and charges a bit of np and that way ibaraki only gets 1 turn which really helps to keep your hp for a while.

Once I LB my Shana and 1 Golden Carp she drops like a fly. I use:

Cu Alter (lvl 100, NP lvl 2) w LB Shana
Hans lvl 64 - LB carp
Support Waver lvl 90 w carp 10/10/10

Irisviel lvl 73 - Carp
Mash lvl 60 - Carp
Cu lvl 70 - Carp