I'm not a great fan of Weat in your team. Or of any girl with skill activation turn 1 with Kerria. Kerria needs skill activation for all the fight and actually turn 1 is almost the less important for her. She don't needs her skill turn 1. She should be full life, unless you're fighting pests attacking first. But even in that case, she may evade the attack.
That's why I think girls like 6* St Paulia should be better. Or Even Sentitive Plant if you're fighting non slice-weak pests. Okay she don't gives Crit but x1.5 damage from weakness is a great buff at the cost of just 1 girl.
Anyway, she is so much the best girl in the game. Even with a non perfect team she is OP.