http://paragon-wow.com/
The idea of the boss is to keep everyone above 10k so Massacre brings them to 1 hp and does not kill them. During Feud you have different aoe damage and have to heal people normally. During the last 10% your heals are reduce by 99%, but you can heal the tanks if both the tank and the healer get HoP or Bubble.

Music: Tony O'Connor - Wind Seeker

UI:
Nugcombobar (holy power tracker)
bartender4
Blizzard raid frames
Powerauras Classic