I use the Deceiver.D1storter said:
The Nightbringer is useless when not in Close Combat... and it's not too hard to avoid it, since it moves so slow. In CC, sure, it's a beast... but, technically, so is the Deceiver, when in CC. Not quite as beastly as the Nightbringer, but still a beast compared to most other models.
However, the Deceiver's forte isn't in CC - it's in everything else. The Leadership checks.. all that tasty good stuff. The Deceiver has an easier time fitting into an army and being effective, IMO, because it can do different things throughout the game, whereas the Nightbringer can potentially just be a waste of points if it doesn't get into CC.
Of course, I play using a "Fear" style army using Pariahs and Flayed Ones, so the Deceiver is great.