Jan 13th 2011 3:29PM Rajh has two interruptible spells, interrupting these will buy you time. Also, let him cast the first fire orb. This will change his cast sequence, making him do more interruptible spells.
Fire orbs and leap are both interruptible.
Another thing to do here, if your healer can pull through, is have your tank go dps. I (the tank) went retribution for this, which made it alot easier.