I've thought this through pretty well, but give me some ideas if you have anything I should add/edit :)
The School of Wind! The School of Air (Wysterian counterpart) The wizards practicing Wind are joyful, never worried, and carefree. Usually, their carelessness gets them into trouble. Wind wizards cast Wind spells 25% of the time, other typed spells 25% of the time, and perfer to fuse spells 50% of the time. The gemstone is Diamond, and the main spell is Elemental Tornado. It's a rank 9 spell and appears as a rainbow tornado and hits the player/mob and deals 2500 damage.
Onto fused spells! Fusing spells means in battle, next to the "Flee" button, you press it and click, for example, a Wind spell and a Storm spell to make a Blowing Storm spell, raising the storm accuracy and damage by 20%.
This is a really cool idea, but Storm is consisting of wind, air, sky, lighting, electric, thunder, etc. so it would be not needed. Also, I love the fusing spell ideas.