I like:
EA: C'tis, Ermor, Marverni
MA: Ashdod
LA: Agartha
As you can see I'm a big fan of recruitable-anywhere mages.
I used to like Helheim but without the Svartalfs I am sad.
-Max
P.S. Ashdod is like LA Agartha crossed with Niefelheim with a dash of Pythium thrown in. Awesome mages, awesome sacreds, awesome summons. Just crazy strong.