Use all your characters

As deep as the class system is in Visions of Mana, it does have some limitations. You can’t respec your characters until very late in the game, and the way you approach boss battles will differ from the way you approach Elemental Aeries. Fortunately, you’ll unlock five characters before your journey ends, and building all of them will let you adapt to different situations as you encounter them. For example, you can build Palamena to inflict massive damage on bosses, while Careena can specialize in Class Strike damage that absolutely destroys huge waves of common enemies.
All characters earn equal EXP, even if you don’t use them in battle. Specialize all your characters in a way that compliments the team—you’ll be happy to have those extra options on standby as you progress.