I've had a number of games with underwater start spots for the AI. It builds 2 metal extractors and 2 energy and then sits there and does nothing. The commander can be targeted but nothing will attack it. The only way to kill it is to build a torpedo platform next to it, move subs nearby and hope they attack it on there own or to nuke the area. Has anyone else had the same problem?
AI doesn't do navel yet, only bots and air. Under those circumstances, I'd guess it should build only air, unless you have one of the bot-only AIs.
AI is really under developed right now. I would recommend playing in primarily land maps when playing against the AI. It only builds air and bots right now. :-/
Ahah if you leave it a bit too long it really gives you a lotta nukes. Played a team game with a friend against the AI and didn't really rush to get our base going, nor built anti-nukes. After scouting their base it wasn't long before 4 consecutive nukes came a flyin'