One thing I didn't see in your lists is the most important piece of gear for a ret pally, your 2h'ers! Go get the Hellreaver out of Ramps! You'll tear down elites before they even know what hit em with 5x ret pallies.

Tip for the last boss, once the dragon lands have your main w/Righteous Fury on kite him around in a circle while strafing while spamming your follow button (this is one of the reasons I have /follow in my attack macros) and you will avoid all the fire breaths on the followers, just use SoL on your main, and 5x DS and 5x instant FoL's should be enough to keep up your main so you don't ever have to actually stop and direct heal.