
I've always figured the amount of usable aether a person has is independent of their physical stature. After all, there's plenty of powerful Lalafellan mages and they don't seem to have any shortcomings due to their size in that regard. As such, I'd figure mass doesn't play a factor at all... unless you're tapping into the aether that's, y'know, helping keep you alive - which as we've seen in the Conjurer quest chain is a pretty big no-no.