Well, it's a good thing you're not being Agartha then
Their troops kinda suck and without strong magic support and heroes they kinda get owned big time.
basic infantry holds up ok for it's weight class, but can't hit a wall, trog's do good damage, but die really easy and everything else is expensive AND still doesn't hit anything (but if you get lucky they will at least kill most things in 1 hit when it lands) plus they suffer from outnumbering on their already low defense.
You need some good casters to ruin the opposing armies as Agartha. At least that's my initial impressions.
I guess I'll be sticking with the Agarthans.
I do so love the atmosphere of that race. So grim.