A little Combat info from the viewpoint of a 85 druid:
He parsed to have 1,553,288 health, so factoring in regen I would imagine it is closer to 1.2million.
Max Hit: 1647
Min Hit: 82
On a side note he dropped Boot armor and the HP aug, fight lasted almost 33 minutes.

First Fragment of the Left Eye
Ixt Berserker's Scalp
Ixt Broken Hoof
Jewel of Focus
Mangled Ixt Tail
Muramite Boot Armor
Muramite Helm Armor
Ruby
Sapphire
Vial of Black Poison