Herald of The Warp
Join Date: May 2013
Location: Odense, Denmark
(CSM) Helbrute Mayhem Pack (Dataslate formation), with 3 multimeltas. Kills a knight outright in almost every game I've used it either in the turn they come in or the turn after. Alternatively throw some Maulerfiends at it with lasher tendrils to reduce it's attacks. 1 can be lucky and get it down. 2 of them will definitely take it down.
(Daemons) What Chaos Vince said.