In my world, all magic comes from the Fade. But mages can channel it in different ways - sometimes it's a choice of what school or theory they will study, I believe, but sometimes they'll have a particular affinity for one branch or another

Although I'm afraid I can't offer a firsthand view, as I'm.... not exactly a mage and certainly no expert on the matter. If you like, i can point you to a few who are, however. If your message doesn't catch their attention on its own merit.