This is my third game, my first as paladin, and I have been doing that since I cleansed the swamps and the graveyard. It's effectiveness, combined with the gold from the swamp makes the rest of Darion and the islands of freedom a child's play, at least on normal. Actually I have a problem with keeping the cursed ghosts in controllable numbers!
However, I have inquisitors and berserkers in reserve and I sometimes swap them in, so I guess I'm not a true undead-player.