Blood DK BIS List

[:1]Has anyone come up with a solid BIS list for 4.3? I'm having trouble deciding which piece of t13 i'm not going to use.
I'd imagine you ditch the shoulders (base threat stat) for the Heroic Morchok pair (no base mastery, but double mitigation stats), since that's the only tanking off piece available.

e: Actually maybe not. The Morchok shoulders have 1 less socket than the tier piece.
why would the shoulders be your offset with the mastery present on them, yet absent on the helm?
so i have to main switch to blood dk for my guild since we have undergone quite a change, i am just starting studying him now for gear and whatnot, i would lvoe to see a bis list as well if anyone knows, if not tho a huge help would be what to spen my valor on, im assuming relic and cape, but i noticed the cape out of one of the new 5mans has better itemazation so it might be better
Comparing tier to non-tier for each slot for reg-mode, assuming you are going for heavy mastery:

Shoulders:
http://www.wowhead.com/compare?items=77268.0.4198.0.52219.0.0.0.126;77012.0.4198.0.52219.52231.0.0.156

Chest:
http://www.wowhead.com/compare?items=77120.0.4103.0.52215.52219.0.0.133;77008.0.4103.0.52215.52219.52231

Gloves:
http://www.wowhead.com/compare?items=77166.0.4107.0.52231.0.0.0.161;77009.0.4107.0.52219.0.0.0.135

Legs:
http://www.wowhead.com/compare?items=71984.0.4270.0.52219.52231.52231;77011.0.4270.0.52215.52219.52231.0.128

Helm:
http://www.wowhead.com/compare?items=77156.0.4206.0.52294.52231.0.0.161;77010.0.4206.0.52294.52231.0.0.133

In all slots, tier generally gives more mastery regardless. Most of the non-tier would be better suited to avoidance builds. Prioritizing mastery>dodge~parry>>>hit>exp the shoulders are an okay choice to non-tier if ya can stomach the mastery drop, you gain more overall from the avoidance and dun waste itemization points in exp. If ya just going for max mastery then none of the non-tier is the better option per slot, though its a closer call for the legs where ur also giving up 30 stam.

The off-set helm can give slightly more mastery than teir if you reforge out of the parry, but that's not as wise as reforging out of the expertise- 5 mastery gain over tier for doing the former is marginal at best and not worth the hit to avoidance, imo.
I'm assuming that you're going avoidance, if not I don't see why you should only use four pieces instead of all five.

I'd go with Morchok's shoulders, they have higher dodge which I am usually short on, and it replaces a threat stat.