Originally Posted by Zandel

Something else to consider that many people don't remember to mention, Having at least 1 girl of each type in each squad makes missions easier for that extra damage buff.

Don't bother with that. One character hitting for 50% more damage is at best a 10% damage increase for the party. You're just trading a boost against one type for another and there's no guarantee anyone'll attack the right enemies. Then there's the fact that you can't crit when hitting weakness. You also lose the small but stacking benefits of whaleship gear.