You need to work on that deck team then. Get one that survives with no or very minimal loss. Its killing your power level every time a girl dies and you don't have any power to spare.
fghk0 has a setup on earlier page. I use some of that and I also use a 6* counter team to beat it. Possibly a full debuff would work, but haven't tried it. Someday Dogwood will bloom and we can nuke it