Grats, You are overgeared to MT 10man naxx.
however, any gear you get in 10man naxx, is going to leave you undergeared.
as you have SO many peices that have the highest possible defense on them....
Go get your H. Utgarde Pinnacle Weapon, and your H. Violet Hold pants.
Get defense to back, and Defense gems in the new pants, and you might leave yourself some wiggle room to actually be able to use the new peices your going to collect.