This past week, I finally got my final titan Runestone after a couple very horrible dry spells, and was able to get my epic cloak from Wrathion. To do so, of course, one has to defeat one of the celestial challenges during the Celestial Blessings quest. After reading a couple excellent strategies, including, of course, WoW Insider's guide, and wiping a few times on the DPS challenge, I settled on doing the tanking challenge.
I'd actually recommend the tanking challenge for any death knight looking to finish the legendary quest. As long as you have a tanking set that's made up of Throne of Thunder Raid Finder gear or better (maybe add a few pieces of valor or heroic scenario gear in there), you should be able to do it. I do this primarily because it's easier to control everything. Being able to tank adds straight on helps, as does being able to lead the Vision of Deathwing around rather than trying to strafe Wrathion. With this in mind, I'm using today's column to offer a few death-knight specific tips to defeating Niuzao's challenge and getting your cloak.