Ok, first of all, this guys essence droprate is by far the worst I have seen from any named so far. In 19 fights, Ive seen 2 essences. The slot 3 shield is without a doubt his rare. In those 19 fights, I have only seen one slot 3 shield and roughly the same amount of non-slot 3 shields and maces. (I don't know that it was perfectley 9/9 but I'd say their droprate is about the same)
I have many parses of him, so this is going from an average with most fights lasting right around a minute or so. My highest parse says he has 550,000 HP (Many parses lower as its difficult to parse DoT damage sometimes). I aa malo him only and have no issues with him resisting nukes.
This mob was quite a relief from some other named as it doesn't enrage or rampage, making life a little easier, especially if you're camping essences or his slot 3 shield. On top of that, he's even snareable but does summon, so dont get too crazy with the dps before the tank has acquired aggro.
His max hit is 6362 which he was only able to hit on the dragorn guards when we pulled him too far and he was summoned up to them. Max hit to a player or pet was 5601. Minimum hit was 206 (bash) averages around 2400, average dps (after being slowed by a shaman) 1700. {Remember, these are averaged from many fights, sometimes its drastically different from the numbers you are seeing, this is overall average, not based on any single fight}
Quick list
Min Hit - 206 Max Hit - 6362 Avg hit - 2400 Avg DPS(slowed) - 1700 HP - 550,000
Not a heavily resistant mob and a relatively easy pull. He is snareable. Does not Enrage or Rampage. Summons.