I maxed at 10.8 self-buffed on the Heroic Dummy. Kept Sunders up and used only own cooldowns/shouts. My Mourne's explosions hit the dummies around it, so 10.8 is not 100% accurate, but it's still very reliable.
BT > RB > HS > BT > RB > Free > BT > RB > Etc. Is more or less the rotation that I used, squeezed in DW and Reck of course.
I can't post links, but my gear is above-par. Shadowmourne, H Cmaker, 2 Heroic T10 pieces, 277 Belt and Wrists, all else is 264 with a crappy 277 Frostbrood ring that I haven't been able to replace.