It seemed to me that RAI was childs play, KAIK was at least a little fun, but still easy to beat, and E323 was HARD! I had to turn it down to NORMAL difficulty, and still had to replay it a good half a dozen times, learning from my mistakes and adjusting my strategy before I finally managed to beat it after an epic game. It finally started giving up ground after it sent a T3 at me and it took nearly everything I had to bring it down, then I rezzed it and started building my own and the pair of T3s quickly started pushing it back, and then became 3 when I killed and rezzed another one of his. It nearly got me though when it snuck another T3 to the other side of the map and blasted its way right into the core of my base. Fortunately my commander managed to D-gun it before it got to my fusion plants and metal makers.

One of the many lessons I learned was that I absolutely had to do some offense myself to keep it from claiming most of the metal mines on the map, all while simultaneously fending off wave after wave of his attacks, slowly expanding my territory and building up some static defenses, and building up econ.

CAI is pretty brutal, but only plays ZK