I think it would be awesome if ambrose was in a transformation school. So, before a battle he chooses what school he would like to use. For example, if he was going against an ice wizard he would use fire. Also, if he was just one school he wouldn't be that strong in some battles because of resist. If he was just a storm wizard then he would have weaker spells against other storm wizards. So, my idea for ambrose's school would be where he chooses before each battle!