The Cleric is not so much of a mage as a melee fighter who favours blunt weapons, shields, armor, and water magic. You can give them another magic school like fire, but they're not a primary caster.
The Enchanter is an air/water mage who tends to specialize in debuffs and disables. They try to manipulate the battlefield to lock enemies down. Using rain in combination with blitzbolt or Bitter Cold is a favorite tactic. They are less specialized in direct damage magic. The companion Jahan is an Enchanter.