Well the idea is that they only get to choose techniques at every level up but then again this is fine.

Can you define "magic systems"? Is ToB a magic system? MoI? Shadow casting? The term is pretty awkward here. Why not just say SLAs?

Is there a reason why the Psicrystal becomes a living servant? I would have thought something akin to a "crystal ball" or Scrying Aid would have been more thematically appropriate. Living Servant does not fit the feel of the class.