Board Thread:Questions and Answers/@comment-25270263-20140805232252/@comment-20426317-20140814000406

Geronimo, Little Devil, Azuki & Knight Kabuto are all self-increasers which means you should get rid of them in the medium/long term - they are strictly a stopgap measure for now.

If you have unlocked Sensu, complete more mags and max her out in skill (and then also in level ofc.). Sensu + Mjolnir will be a good start towards a proper anima booster defense team. You can also add Thomas in there to help if you can't find higher defense cards, though he can't be skill maxed so he doesn't stay useful as long as Sensu.