Well, triple-a has an AI but it’s not very good and that’s about the only option, I think.
This may be of absolutely no use to you, but….
I had a vast reservior of Classic knowledge, much like you judging from the number of your posts, when revised came out. So what I did to prep myself was to find a finished game here and print it out. I then played the game as they did. Before I looked at the coming move, I purchased units and made my own combat moves. Once I resolved the combats on a dice sim and finished the turn, I looked at what really happened in the game. I asked myself “what did I do differently?”, “why?”, “Did the player see something I didn’t or vice versa?”, “Whose move do I prefer most-mine or the players?”. Once I got to the point where consistently our moves were identical or I preferred my move over the players, I knew I was ready. I had learned everything I could from that and the next lesson had to be learned in plastic blood. The whole time I was doing this I was also formulating each countries opening moves.
So now here I am, about 20 posts in and I’m already butting heads with people about German IC’s, attacking Hawaii, and Germany in Africa. Unfortunately, one of those guys is Trihero so I think I’m in for a first class *ss-whipping.