Struggling to clear this on my sniper ( running lethality) doesnt help that there seems to be a constant delay in trying to get skills to work i just seem to slow and squishy , only came back to the game recently but was doing OPs in Hm before i left and have been an end game raider in other mmo's for years so a must just be one of those noobs who needs to learn to play there class it seems.
Edit - also had him at 5% or something then cant hit him with some sorta lame skill lag few times rather annoying.