The pally tanks active mitigation up time is pretty bad, even considering it will less than it normally is because of heart rooms. He also needs to ditch the Hammer of the Righteous glyph, it's completely useless. Also using seal of truth is questionable - I don't know if he's trying to increase his dps but truth hits for so little in prot it isn't worth it.
Thanks for all the replies, got a lot of great responses and our group has a lot of changes to make before we try again on Monday.
I'd rather have a bottle in front of me than a frontal lobotomy.