Also try to elevate the girls XP. You can put the girls XP as high as your own current player XP. So if you are level 28 you can max your girls XP to 28. A tip is to always buy all the books you can at the market twice a day (they restock every 12 hours).

The more XP the girls have the better they get at battles.

Always put your Alpha girl the same as the judge. And going back to the market: Use equipment that benefits you according to the current judge.