NEVER try CC in killteams unless you know that you severely outnumber your enemy. And I mean by like 3 to 1 or better. You cannot multi-assault in KT because of the Every Man for Himself rule. Because of this, your models will almost always either chew straight through your opponent (leaving them exposed to return fire) or die embarassingly to a lucky guardsman, leaving him and the rest to open fire on those still footslogging it around the board.