From the website
The Wizard class is universally heralded as the offensive magic specialist. Due to their feeble vitality and defense, Wizards are unable to take damage for too long, but any doubts of their usefulness dissipate with the power behind their explosive magic potency. Although Wizards are exclusive staff users, they prefer to be at a certain range from melee combat. If the Wizard can be at the right distance away from their targets, their remarkable offensive arsenal can be shown in full display. During party play, Wizards thrive in dealing a horrific amount of damage, even to multiple enemies at once.