this leaves you playing for 30 min just to eliminate them
There's already a setting specifically designed to address this problem. Turn on "AIs surrender when one human remains", that way you never need to play versus AIs.
Trying to make AIs play with no human involved in multi-player is fraught with challenges that would make it very difficult to implement without risking crashing the WarLight server. The specific problem you address here is much more easily solved with just surrendering AIs instead.