Array of descriptions for each tier - worked OK, schools which are not learnable by class. the only disadvantage is filling all Tier slots for all Schools 
Magic: FireMagic, AirMagic, WaterMagic, NatureMagic, BodyMagic, SpiritMagic, Psionics
Physical: Defence, Warfare, Assassination, Hunting
Weapon masteries: Dagger, Sword, Axe, Spear, Blunt, Staff, Bow
Armors: Robe, LightArmor, MediumArmor, HeavyArmor, Shield