Heroic: Conclave of Wind

I made an instructional for Ravenous Creeper kiting if any DK is having trouble with this.

http://www.youtube.com/watch?v=WTLvb09x-_I

Not too hard to solo in 6.0.2, but you have to kill them in the right order:

1. Anshal first, so you don't have 100% healing debuff ([spell=85576]) when you're not on his platform.
2. 
   
3. As caster, Nezir second, so you don't have 500% haste debuff when you're not on his platform.

Make sure to stay on each platform until the boss is dead. If you jump away and let your DoTs finish him off, you will get the boss's debuff as you fly away, and you may not lose it when it dies.

Major differences between normal and hard:

Rohash's Wind Blast is now lethal, you can not survive being hit by it in. In addition it moves much faster and has a larger radisu.
Rohash now occasionally puts up a Wind Shield, everyone on the platform takes 30k damage per tick until it gets destroyed.
Rohash puts a stacking debuff on the target he is attacking, meaning target swapping is necessary

Nezir is mostly the same, but the damage he does is much more threatening. 5+ stacks of the debuff can become lethal. Frost patches will slow and root you in a few seconds now. His AoE during ultimate is also more deadly so everyone needs to stack up and get AoE heals + barrier.

Anshal's major difference is that the adds are extremely deadly, their AoE pulse will instantly kill you. Thus they need to be kited for the entire fight. A frost DK is ideal, with the help from Mages' ring of frost each time they come up. The videos above provide some good instruction.