[TheAkrab]

Actually, I just tried the new infernal, it's on a 20 minute cooldown and has a 1 minute duration (it breaks apart after 1 minute).

There is only one word to describe it... Divine.
The Infernal's fire aura deals 200 fire damage per second to all around it. And its melee attacks deal about 300 damage per hit. It's very hard to kill as well. I tried it out in Vengeance landing against a level 69 Wild Worg. The infernal accidentally pulled 4 of them. Just to see what potential it has, I let it take care of the Worgs without interfering. The Infernal won with about 20% of its HP left. It's also the same level as the Warlock again.

Hope this brightens your day! I'll try and round up some folks for a doomguard today. =)

Edit: I've a lot more to say, so I'm making a new topic. The Infernal's damage also scales with spellpower.