Tried with my druid tank, fail miserably
Just did it 1st try on my DK (respecced blood for the occasion) at 220 ilvl (pvp gear), it's definetely doable, probably not for all classes though. As a DK, I had no consumables, and on the last boss I would advise to focus the adds and try to not fall behind on killing them, other than that it's pretty straight forward, if you make it to last phase on heroic where there's no more adds you won. The mount is pretty cool \o/Edit : talents were 2-2-1-1-3-1-2 and runeforge was sanguination.
Did it with a 214 necro protwarrior, never got under 80% hp
did it with a 208 vengeance demon hunter, ez.