OK so by now we all know that Total power is just the Girls HP, Atk and Def added together.
This means that all of the highest total power girls have high hp and generally average or lower atk / def.

My question is this:

At what point is High Atk / High Def better then that extra hp in actual combat?
Or in other words, which girls with lower hp do you find worth using in your squads even tho they lower the total power of the squad?

Just so you know, I'm not interested in the girl you use because she is your waifu because for obvious reasons she doesn't count and should always be in team 1.

I have found myself also taking speed into account recently, St Paulia is one of the strongest 4* but because of her speed i'm considering moving her or even dropping her all together soon.