[Salamander8]

I find all ages have something to offer, and I have favorites in every era.

EA: I like Yomi, R'Lyeh, Agartha, Abysia, Atlantis, C'Tis and Lanka.
MA: has my all-time favorite nation and version of R'Lyeh, Agartha, Abysia, Atlantis, C'Tis and Shinuyama.
LA: Jomon, Agartha, R'Lyeh, Atlantis, C'Tis and the undead hordes of Ermor.

Even in Late ages I find mages are very important. Early on they don't do a lot in battle in any era, but as you research more and more spells, they slowly but surely become more and more crucial.