ok, i will conduct a little study.
i will fight some bosses and note their lvl and the dmg i deal on them.
then i will change just the first 2 teams and list some more fights. i wonder if the average dmg will be the same.

for normal RBs the girls that will do best are the atk nerf squad and then the +RB Atk squads, for Lvl Up bosses that are set to only 5 rounds weather you die or not per squad then +RB Atk and +Atk will have more value.

I'm really interested to see how much +Solar drop / damage will do in the new event. I have a lot of girls that I don't use often because of those stats and i'd love to see them have a more active role then just nation battles.