What you first need to do is get a Nu Mou into an illusionist class. This Class is posted above. After he becomes an illusionist master the absorb MP ability ( lordly robe Negotiate Lv.45 I think) Then turn him into a time mage and master quicken and reflect. Cast reflect on an ally and then cast quicken. The quicken will bounce and hit you then youll get 10 exp. You can do this over and over till your desired level. Lv. 50 is attainable in about one to two hours.