Yep, it's as I suspected with Blood Mirror - take a Holy paladin and you have an easy time of it. If (like us) you don't raid with a Holy paladin, you're going to struggle with the raid damage; it's far from insignificant. This week we're going to be taking a pile of shadow potions to lessen it a bit more and, hopefully, that'll do the trick.
I resolutely refuse to gear up a Holy paladin of less skill, experience and commitment just because Blizzard seems to like fights that favour them so strongly.
Unwavering Sentinel: Tales of a Protection Warrior Running Wild.