Suggestion
I think healer class should have a Shaman.
Use ingriedeints and mana to do special healing and buffs
as well as summoning natural animals like a wolf, sheep, cow or pig to attack there enemys :X.
Casters- Sage
Dragon breath -, when shooting the projectile and landing on ground it does 4x4 fire explosion igniting the land 4x4
Seeding - encase the enemy in a tree, hollowed inside. They can however escape it buy using a wood cutting axe
Wind Force - pushes the enemy with a windblast
lighting barrage - Chain of lighing stiking the ground randomly