Besides all the 'toughening up' advice, it also depends on how you deal with the pairs of guards in Sethekk halls. Of course you need to be sure that your holy shield is up, that is a given, but there is something else you need to realize: They can not be CC'ed, but they can and should be stunned. Especially once you get to the tougher versions deeper in the dungeon.

Your pally stun works on the guards, be ready to stun one of them, preferably not the kill target, as soon as your healing needs to catch up with damage taken. Ask your group to up their healing and and use their stuns on these mobs.

My tankadin is quite ahead of you in stats, but I still do it that way for safety =]
http://eu.wowarmory.com/character-sh...r&n=Stephanius