[quote=@Light]
A pretty neat and organized little system that's still quite open ended. Nice. I'm curious if there are schools of magic for healing, force, sound, light or darkness? Or if these kinds of magic are interspersed among the schools you listed?

And/or are there any Divine arts? Or is all magic learned and therefore Arcane? 

I'm also intrigued that time magic is considered taboo in this setting. Not that I disagree with the choice, it's just interesting as a side note.
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Yeah, most of those functions can fall under the eight Arcane Arts. For instance, using Electromancy, one could create soundwaves by firing off a lightning bolt big enough to create a clap of thunder. Or, since sound requires oxygen in order to be heard, you could potentially manipulate that with Aeromancy. And using many of those eight Arts, you can also generate forces, light, and shadows. For instance, fire creates light, which then also creates shadows. As for healing, aspects of the different Arts can be applied to that, but Druids who specialize in the regenerative spells within Ecomancy tend to make the best healers within the students. 

And while some people may use their magic in service of a religious figure - such as the Cult of Tiamat or the Paladins of Bahamut - they derive their power from the Aetherscape like everyone else. All magic requires Mana, and all Mana is channeled from the Aetherscape XD. 

Though, I do want to specify - the Forbidden Arts are restricted for the students because they require advanced training at specialized schools to master. Chronomancy is used by older, wiser Magi, usually investigators who need to go back in time to secretly witness a crime or gather intel on some dire situation. Any use of Chronomancy is heavily regulated so as to not create paradoxes. Same with Hemomancy and Osteomancy, which are generally only permitted for trained medical doctors and surgeons. Psychomancy and Necromancy are the most restricted of them all and are almost universally condemned outside of wartime. 

I hope that answers some of your questions XD.