A couple of things I can see, looks like you're missing enchants on your bracers and cloak. For the bracers there's the new +40 stam enchant and cloak there's always +16 defense, you can also upgrade your shoulder enchants via exalted with Sons of Hodir rep.
I believe that the belt from Emblems is better than one you have (40 emblems I think) and there's also a nice dodge trinket you can get with emblems to upgrade the pocketwatch (40 emblems also if I'm not mistaken).
In the meantime why not try pugging OS and Vault (along with Naxx) as much as possible ? I know on my realm I'm always getting asked for pugs for these instances so I would assume a similar amount of raid pugging is going on with most medium/high pop realms?
As far as what you should be stacking, Dodge is the cheapest pure avoidance stat you can get (so I would suggest gemming for dodge instead of parry), I'm not suggesting gimping block (which is mitigation) however I'll leave that question up to the experts in warrior tanking (I'm a pally tank/healer and our mechanics are a bit different when it comes to block). You might also consider the defense enchant for shield instead of the stam one as it will provide some additional avoidance as well as some crit cap "buffer" for gear/gem/enchant swaps.
Lastly, personally I prefer the accuracy enchant for weapon (+25 hit/+25 crit) probably a matter of personal preference but it's worth considering.
Hope that helps.