Paladin Tanks and Mastery gear
I use the addon ratings buster. You can configure it to show the gains or losses for dodge/parry/block on the tooltip. If the piece is avoid/avoid, you do have to do a little mental math to estimate the change after reforge. Most are good to pick up.
Don't forget, mastery+threat or avoid+threat is potential 5 man or gimmick (alysrazor) gear. You don't have to have just one set.
Having said all that, I am hoping to gear:
Shoulders: rag or alys
So far, bracers, shield, weapon are all that has dropped in all our clears. The three lowest itemized pieces. The boots there are only two people in our entire faction with the pattern so you can imagine how backed up they are on orbs. We still have agi users who need the back.
Looks like I'll be going into 4.3 with a lot of 359 gear despite full clearing FL for some time now.
"he doens't need healing, he doesn't need healing, he doesn't nee-WHAOSHIT!wtf was that man!". Please stop leaning on TDR. -Teng