So I showed Fnx' video to some people in guild interested in soloing 25 heroic LK but they don't agree with me that standing in Defile, especially at lower item levels, is a DPS increase as Defile is magic damage. Been trying to find some indication that Defile is granting Vengeance in Fnx' video but all I have to go on is indirectly comparing attacks' damage based on the situation. I'm starting to wonder if it's just LK's Soul Reaper occurring when Defile happens.
Edit: Found this quote in a
5.2 Guardian thread so figure it's applicable here.