>>536343339
Ok, I think I get it now
You are using the wrong team, no def debuff and a healer you don't need
Himari is a good choice, I would replace Serika with Maki for basic skill debuff
Also sSaki is not the best tank
Be sure to check if your borrow dHina has all skills maxed, I tried this one and it resulted only in 2.6 million damage dealt