(Welcome to FRAF! :D Don't worry too much about unspoken forum etiquette. The only thing is, well, I have a sneaking feeling that this is probably a duplicate thread, which are avoided. I didn't go and check myself, but I'm pretty sure there's at least fifteen threads buried in here somewhere about Ly'lac and her eventual friends' classpects.)
Personally, I'm holding off on more specific classpect guesses until we've spent more time with these guys, but I can't deny the very obvious Doominess around Ly'lac. Honestly, she's laying on the Doom coding so thick I almost want to think it'll be some elaborate bait-and-switch, and they'll reveal all that fatalism is just her Nymph way of expressing Hope and the bombs are just... uh... Hopemagicbombs! Or... something.
I do find Mage of Life for AA intriguing, though. There's certainly a case to be made for Life but I'd say Mage/Seer is the even more likely part. For as much as we talk about classes as Verbs and Activity, they are also just plain old archetypes, and giving AA an orb is preeeeetty archetypal. (though perhaps orbs are just a prominent part of culture/technology for the more up-to-date non-Ly'lac Nymphs, owing to Rose's influence)