LogFAQs > #914005128

Use Reese & Cyrus with a strong spirit with 3 slots. Ideally you want a spirit with 3 slots of every color.
95% of Spirit Battles trivialized. It's seriously crazy how overpowered this spirit is after you use it for a few battles and figure out how to use it properly

You will still have trouble with spirits that focus on making one enemy really strong (like Giant high health stamina battles). In those cases what you should use really depends on the fight but you'll probably want to prioritize on defense