So I smashed Doomwalker last night!
Took me like 10 tries but I finally managed to get him. 517 gold and two BOE level 70 epics which I then sold for like 200g each. Nothing like a 1000g investment for about 10 minutes time (of killing him that is). I just had to find a good position and rotation to keep him from taking out my DPS early. Only time he really becomes a problem is at about 300k health when he frenzies and does mass load of damage. That is pretty much when I blew all my cooldowns. Although you could do it off the start and by the time you get him further down in life your CD is back up again anyways.
All in all was a slow dps race (because of the aggro reset).
