On pieces like your back, you have reforged away from mastery even though parry is less important and there is more parry on the gear. You would be better off reforging the parry on that piece. The shoulders you can reforge the parry to get expertise as well. Parry and dodge are some of the lowest priorities so usually you will be looking for something to reforge those to like hit/exp/mastery.
"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