Some thoughts about offset items for 6.0:
It may be worth getting a Chestguard of Toxic Injections (Klaxxi Chest) as this will have 2642int 1968mastery 1520haste and 2x red 1x yellow sockets presquish,
while the set-chest has crit+mastery. The Dark Shaman shoulders will have haste+mastery too, but it will still have the blue sockets. (not 100% sure yet)
I will definitely go for this chest and the Protectors boots if those drop the next few IDs.