Refresher on how classes use Aether?

[Miyha]

Is Astrologian chopped liver? :P

Adding onto the above, AST would probably be classified as using external aether, as it seems to draw upon the heavens for its power. It is explicitly stated (and the plot of much of the 3.X quest series) that one must attune to the six constellations tied to the major arcana to "open gates". Considering the fact that you can use all six cards as soon as you get Draw, I would think said attunements do more than just allow the AST to use card buffs.

I can't remember if it is stated that attuning to these gates is synonymous with attuning to six of the seven levels of heaven? I do believe that it is stated somewhere that the AST is only able to attune to a seventh gate when about to die.