Over a few days on test, I made this vid displaying the power of a Rank 13 disc / holy priest (32 Disc / 19 Holy) when wielding anywhere from +457 dmg to +1434 dmg. =)

Mind the zerg of premade 60s, default ui and the lag of PTR to show you the true power of a holy / disc priest.

http://wow.allakhazam.com/profile.html?47490 - Profile

#eminence @ irc.enterthegame.com
http://eminencewow.com

Music:
Opening - Reanimation
Papa Roach - Getting Away With Murder
Disturbed - Pain Redefined
She Wants Revenge - These Things.