>>532134086
Team building is simple for stages: 1 tank, 1 healer, fill the rest with low/mid cost DPS to clear stages.

Tsubaki, S.Hanako, Akari, iori/Momoi/Renge
Serina, Kotama

The above team will clear pretty much all stages without any issue, and if you have any issue then sweep for equipment and levels.

Don't sleep on Renge, her range is massive.