So I did GB recently with my DKs and failed miserably. here's the weird thing, I already killed the first boss and got the achieve on my first attempt. I went in again with better equipment and got smoked by the trash. It was a real head scratcher. Both attempts were in pvp gear. Now my druids team is doing pretty well, because they gain dodge from PvP gear where DKs don't gain any (our very little) avoidance. Druids are at like 32% dodge and lots of armor, DKs are at about 16% dodge and parry and very low armor.

I think next patch will help out DKs immensely with armor buff. Druids get a nice health buff though