Here's a simple video/gameplay of the Spine of Deathwing from Eastbound and Down (Kil'jaeden US).
Link - http://www.youtube.com/watch?v=6IjIUNGQ5JI&
The video includes the following,
Shadow Priest POV - Danarys / Kil'jaeden US
Ventrilo Recording - No editing, straight forward.
Music - Dubstep, BUT past/future videos vary from all sorts of genres.
World of Logs - http://worldoflogs.com/reports/rt-j000im8u7p780xe1
Composition - 1 Tank, 3 Heals, 6 DPS - Blood DK, Holy Paladin, Disc Priest, Resto Druid, Shadow Priest, Arcane Mage, Affliction Warlock, Combat Rogue, Frost DK, Fire Mage (who was a PUG)
Shadow Priests can be flexible on this fight. Since you have to watch how fast and not over dps the Hideous Amalgamations, you can help out by healing off the Searing Plasma from the Corruptions which will greatly help your healers out.