Just cleared it myself this heroic. My team is roughly il675, way above the intended ilevel but still had trouble on last boss. basically the method used in this post http://www.dual-boxing.com/threads/5...Grimarail-Down did not work for me. the damage of the ground aoe is just way too high for me to heal through. I ended up everyone on follow and moved around with the tank. Was still a pain since the spear has a good chance to hit my team. the fight ended with just my healer and tank. maybe disc priest is not adequate since there is a lot of movement going on. Still don't understand why they removed renew from all specs except holy.

the most painfull experience for me is to have to hear the last boss talk. No pun intended but I just hate her voice.