The warlock in my guild says it is but his reasoning was Shadow Trance, but looking at the tooltip it says the most recently applied corruption so I'm confused. After pointing that out he said it's better for his trinket procs. I don't know much about warlocks so could you guys help me out with a concise argument against what I think is just him padding.
Edit: I forgot he is affliction and these are our logs http://www.warcraftlogs.com/reports/ZKgtc3P1VxAhbnDw