Under rating threshold (hideshow)
After spending more time with this game, I can say that the balance definitely needs some tweaking. Advancing rounds doesn't earn any money, so the best way to "farm" gold is to allow your own forces to be beaten back a bit, keeping the fight around the middle for ungodly amounts of time. The upgrades are extremely expensive, but so crucial that the game seems to become physically impossible after round 12 or so if you don't have them. It's fun, though. Kind of a mix between Bowman and Prince of War.