AI picks add some nice randomness to the game and can balance out players, but it can also really screw one player. Our first AI game Walrus had four or six batteries of 155 plus 120mm mortars and air and I had a single 81mm on map mortar, a 120mm on map mortar and a single 105 arty piece, no air. I had superior tanks but they were centurions and moved so slowly that he just clobbered them with heavies, total arty fest. After that we had to start disclosing to each other at game start how much arty we had to balance it out, but then the player who has to turn arty off loses on battle points. All in all just a mess.
Using buying guides works better, IMO.
This is our old buying guide, the % don't work anymore and the rest needs to be tweaked, something we are just starting to work on, but it lays a good foundation.
Some of us are busy doing things; some of us are busy complaining - Debasish Mridha