A boring game
This design of game is old and stale, and it was never good to begin with. I can appreciate your efforts to inject variety with the terrain, but it ultimately failed becauye varying terrain amounts to nothing more than another luck factor, unless you have control over troop placement.
Ultimately, like any other game of it's ilk, it comes down to spamming the biggest unit you can. 1 catapult and 19 warg riders won me the game, after 21 painful minutes.