I still put on Blade Furry during 2 targets and they are in range of me. You should NEVER be using FoK or CT with only 2 targets. The only time you ever use FoK, is 5+ Targets as Mutilate. For combat, the only time I have used FoK this tier is during one of Garroshs Add Phases where you run down the straight path while your tank picks up the 30+ small adds.
As for CT, I have used it in the past as Mutilate, but my research tells me CT is pointless in all situations UNLESS those adds will be alive for the entire duration.