What is your team composition? I have 1 prot pally and 4 ret pallies and am loving it. I can clear UK and Nexus and then there are several other bosses I can down (still gearing up).

Avoid that boss (whirlwind guy) in Nexus. Actually, not sure if he is actually a boss but he mows my team down everytime so i go around him.

For some bosses who have front AOE I turn my rets around with their back facing the boss then taunt and bring boss in front of them with his back to them. If they get bounced I just /follow and run to reposition. The last boss in UK I use this and never have to move them at all. Just have to make sure they are just barely in range to hit him or they will get aoe'd.