So I don't know if anyone already thought of this, but I realized that you can practice the master tower ex fights on the actual overworld NPCs to get a rough idea of what you wanna do, and then do it in the actual tower. The shields are lower in the tower, but again, the rough idea helps. That helped me beat this floor and the next couple without wasting too many attempts, so if you're stuck on some floors, maybe try that. Thanks for watching!