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.