The move I got hit with is a dark breathe type move that goes through shadows, additional effect of that move is poison. I'm not sure if you get poison on physical attacks. Blink tank is good, but only problem is you want to kill it asap, so I don't think tanking is an option fighting this NM.
I was on NIN and had 1031 HP when I got hate fighting this NM. It did a move that went through shadows, and did 1005 dmg to me with a -50HP/tick poison, of course I died from poison.
The main tank PLD died in the first 30 sec of the fight, that's how hard this NM hits...the PLD has full Koenig and 1900+ HP.