I try to keep a variety. Robin Hood uses bless, curse, and almighty, with a couple support skills. Loki is almighty and physical, plus offensive buffs and shields and a little bit of fire and curse. Kushinada-Hime is primarily healing, with one ice ability...Rangda and Valkyrie are both physically oriented, with Rangda reflecting physical attacks and gunfire and Valkyrie having a wind skill thanks to a borrowed skill card. Then Queen Mab is electricity, and I have a few status effects scattered across several of them.