Anyone tried using them as backfield blockers?
Thinking here is they make for a pretty flexible deterrent unit to any deepstrike hi-jinks. After all, deep striking units tend (but not universally so) to be fairly small, and typically high point cost, precisely the sort of unit which likely don't want to get stuck in combat with Mutilators, whilst being prime prey for Mutilators themselves.
Again, their lack of pace makes this slightly dodgy as their effective patrol range is limited (at absolute worst, a meagre 3" walk and charge) but against a cautious opponent, it could encourage them to deep strike further away.
Added bonus here of course is one could keep them completely hidden from sight until their head breaking skills are required, cutting down the potential attrition. Should go without saying that this would favour a dakka heavy army. Not being a Chaos player, I'm not sure how well Chaos does gun lining though.
Thoughts?