I wanted to make a topic discussing KJC and to add something worthwhile off the bat, I'll share a quirk I discovered (maybe new, maybe not). If you are standing still while casting UA or Haunt, you can start moving again in the middle of the cast and it will not incur a stack of the debuff. This does not apply to Malefic grasp, sadly.
In the last few weeks of raiding, I've loved KJC, especially on Vizier and Blade-Lord. With the recent changes, I feel as if it has been nerfed heavily, though. It seems to work alright in those first two fights, although not as well, but I'm torn on Garalon. So yay or nay?