Is it just me or is the AI really poor? They build one defending unit in every town and then they send units at you one by one. They hardly build any mines or obelisks, and they never mass units to attack with. I'm surprised more people aren't complaining about this, since its the biggest flaw of the game in my opinion.
This seems like you made it to get extra use out of the units and stuff from Endless War Defense and to be honest I don't like either game. There's no thought or strategy involved; its impossible to keep your allies alive or get much use of them at all and all you do is circle strafe German units until they die. And the action is all so distant its not exciting at all. If both sides actually fought like they meant it would be more fun, but as it is it just doesn't work for me.
Oh, also I think it would be a good idea to have buildings that help armies attack adjacent spaces. That would be more useful than eight different choices for defenses
I like the game but it has some faults. I think there are balance issues, especially with archers. The AI orcs often build armies of nearly all demons and they massacre an attacking army before they can get halfway across the field. Also the AI is kinda dumb, they'll often attack neutral spaces over and over again with only two warbands instead of building up. Also the maps get bigger as you reach later levels, but the small maps are actually a lot harder than the big ones, probably because the AI's faults are more obvious on the big maps.
Finally I agree with rexdivis that some kind of "hero" unit for each faction might make things more interesting.
 "Takeover"){kind=icon}
 "Endless War 5"){kind=icon}
 "Ultimate War"){kind=icon}