I thought about this too - you could run 2 of those instead of the 2 dark-dweller and 2 makeshiftmunitions that he runs. Would make room for some more card draw with fanatical offering or faithless looting, or some relics, or artifact hate. what I did like, when I played this deck similar to his was the dark-dweller can help sift through your deck to find more combo pieces in a pinch, either by sac-ing a putrid or sac-ing itself to deadly dispute etc.