Castor Beans looks great but... I'm not sure about her +250% Def and 300% retains HP under 50% HP. Getting under 50% HP is easy but surviving the attack is not. And it's not very effective in the castle since you want to stay healthy for the 10k points. Or she needs Spade-chan support.

Crepis is good with her crit buff for all target skill girls. I know there is a lot of lolies and very young girls in the game and usually I don't really care. But... who let a 4yo girl fights giant insect monsters? And... well I'm glad I'm playing all age version.