I've put together a fast, brutal party of slavers, and we love to burn villages. My dream is to undermine the economy of Rhodoks so badly that the other kingdoms devour their lands.
However, I'm not certain that such plunder actually affects the AI players. Does anyone know? I'm suspicious because of things like the AI magically spawning new soldiers into a garrison, without any lord recruiting them, training them, or moving them in. I assume that the AI uses many shortcuts. Since I've never seen an AI lord enter a village (and collect his taxes), it makes me wonder if that economy matters at all.