Here's an example of what I'm thinking.
Mage
Arcane (14) : Conjure Food, Conjure Water, Conjure Mana Gem, Counterspell, Detect Magic, Dampen Magic, Amplify Magic, Remove Lesser Curse, Mage Armor, Polymorph, Mana Shield, Arcane Intellect, Arcane Explosion, Arcane Missiles
Fire (5) : Fireball ...