To win with Gunseng, this is what I did: I deployed my MCV right next to one of those walls that is part of the land. This way, Copec's troops had to get around that wall to reach me. After the first attacks, I attacked to the right of my base. That is the weakest part of the map. I built many defense platforms to defend against enemy attacks. I eventually build another MCV and deployed it close to the bridge to the palace. Before I attacked the palace, I destroyed the devestators. I took Adv Carryalls, picked up a dev and was attacked by the other devs. My advanced carryall was destroyed, but so was the dev. After that, I took out the gun turrets guarding the bridge, then I sent in a bunch of infantry and tanks and one engineer. The engineer took over the palace and everthing else was just bait for the turrets. I am much better at the game now than I was when I beat that level. There is definately a more efficient way to beat the level.