Save Fever
It can be tempting to use Fever once you have it charged up, as it restores your health, makes your attacks strong, and halves the requirement for special attacks. However, it takes a while to charge up, and wasting it prematurely can put yourself and your team at a disadvantage.
Instead, you should save it for when you’re facing off against a quest’s boss. These tend to be much more powerful enemies, so being able to up your damage output will definitely help when vying for success. Alternatively, if you’re on a quest that is longer than most (more than four areas), you can pull off your Fever twice, if you manage to get it charged early on. However, that probably won’t happen until you progress quite a bit. So until then, save it for the end.
