But then the question becomes, could he get away from the dark and dangerous environment he's operating in and throw himself at Wencit's mercy? Moreover, would Wencit consent to train him given his reticence to reestablish the White Council in Norfressa? This might happen in the future, a final peace of the puzzle that Wencit is putting together. Then again, it might not.
IIRC, when Wencit wanted to send a warning message about messing with Lianna, he killed the major wizard, but stripped the minor one of his power in order to have a messenger.
The question here is, what would he do with a volunteer? Likely it would depend on whether he had a solid method of determining whether trust was possible.
Maybe Tomanak would do something to ensure this. In Christianity, it is assumed that when there is true repentance and a turning to God, that there will also be discipline, producing changes. Look at Chuck Colson's change from being Nixon's enforcer to devising Prison Fellowship. OTOH, some people just don't like the unpleasantness of discipline. Ask any basic training sarge