Is there any chance you'd consider lowering the maximum mana that AD and GS can use? These are spells designed for prolonged combat usage, yet it's extremely difficult to keep them up very long at a mana level that awards experience and provides decent potency. For AD this is needed to get a non-negligible stat boost, and for GS it's necessary to get a warrior of non-penalized prowess. Granted it will probably get more manageable once the cambrinth bug is fixed, but they're still really very costly as it is.
Thanks,
-Life Sustainer Karthor