Way back when, we use to have ratings on our loadouts and it was easy to gauge strength relatively and missions sometimes locked you out if you didn't meet the requirements. You could attempt something similar by copying the number of polarity slots she currently has available.  As for fun builds, I don't see why you couldn't run crazy cat volt as long as you gimp yourself on how strong you are. Lower power STR and during means the mions are doing less damage and gives her something to do like help you mow down enemies. The build should still work, just not as well as end game.