For raids when chaos is attacker or for low pts games light cruiser could work really well.
Heretic is 130 pts, has 6x30 port and starboard wb and 6x30 prow wb, 30cm speed, 90 degree turn, 1 shield, 6 hp and 1 turret.
Now tell me where this does no fit a chaos style or weather it is better than a slaughterer.