There is a great thread on building armies in here somewhere, from before the new Ancient Hegemony units were added to the game. Some solid advice from a veteran player or two, plus Steve and Aly.
My 'Ark' build from that thread:
Van: Brute, Lancer, Light, Heavy (total 24)
Res: Jump, Assault, Medium, Cavalry (HQ) (total 28)
Starting Glory: 28 I think, but it's getting late and I'm doing this from memory.
It is intended as a Blue build, to respond to whatever Red does as a counter. It's got one of everything, an idea that was poo-pooed by Jackson but seemed effective in practice.
The trick was to Scout a terrain-heavy flank and more open terrain in the center and opposite flank. The Brute and Light went on one suit in the terrain and the Lancer and Heavy went on the other.
The rest of the dudes would get deployed as needed, per situation to counter appropriate enemy deployments.