Oh! Oh! I just thought of something about the subaspect division thing, what if those are like trees of focus like in traditional RPGs, like how a Mage may be a Necromancer or a Pyromancer or even a Paladin(Offense oriented battle mage basically in my head)

I mean, that IS how it actually kind of works in canon! Light is broad and can be so many different things, so two, say, Seers of Light, may be better at different Seer of Light-related things and focus more on them. It’s this kinda stuff that gives even more flexibility to the system!