[@BladeX]

My review is much the same as Syn's, but I have a few tiny niggles. 

For the Light Weight Rock Technique, no flying. I realize it's a minor thing, but it's a thing. No flight. 
For the ability to turn into smoke, you may want to increase the risk a bit. Like what can injure the user when they're smoke. Maybe consider increasing the cooldown if you can't come up with a balanced weakness to effectively turning into air.