[TheMenacer]

I think a fourth age would be pretty nice, not only because who can complain about having more stuff to blow things up with, but because I think it'd help define the nations a little better. There're a bunch of nations floating around the early ages that I don't think really fit the mold, like Maverni and Tien'Chi that don't boast the tech to be in later ages, but don't have the mythical feel of the other EA nations. Granted, they have the same high-powered, capitol-centric mages of the other EA nations, but ultimately those awesome mages are just regular dudes with higher numbers than their later incarnations.

EA nations that I think really fit the mold have things like nonhuman recruitables, with bonus points if they aren't just some other species, but something really mystical in origin. They should just overall have a real feel of the uncanny about them, that this was a time far in the past where magical crap rubbed shoulders with the common man on a daily basis. Humans should have low level access to magic at best unless they're really above and beyond their fellow man, perhaps as unique hero units. An age slipped between early and middle would be something like those largely magical nations having fallen, giving primitive humans the opportunity to scavenge their secrets, and then the remaining two ages are as they already are, increasing levels of technology with decreasing levels of magic.

Edit: Roughly I'm thinking the progression should be
Magical Beings with the occasional mortal thrown in ---> Mortals with tons of magic ---> Mortals with less magic ---> Mortals with very little magic at best