[Sombre]

Depends how much barrow wights cost :]

Domkills are very hard to defend against when they involve blood sac and domspread units. But if they have to expend significant effort on the stuff, then it isn't so much of a problem. Of course rdonj seems to indicate that he'd be massing barrow wights even without the knowledge that they domspread. So effectively you're pushing dom like crazy for free.