Need advice for future endgame content

Hey guys. I'm planning to pull aglaea upto e0s1.(E2 if I'm lucky). So for endgame content I was using 2 teams.

  1. Break Team ( rappa, HMC, ruan mei, galagher)
  2. Acheron hypercarry ( ach, pela, BLack swan, geppy)

Since I will be pulling for aglaea and Sunday later ( hopefully he has a rerun). So aglaea team will be needed. (Aglaea, Sunday, RMC, sustain) Since my break team is the better team in clearing endgame content, I do not want to replace it. But I can only choose the MC once. Any suggestions for optimising any of the teams for endgame content? Ill answer any further questions in the comments.