Post by Lightrain
I would go more with a build like http
this. It covers all the basics you need.
But, I don't think you are getting gibbed that way. I'm not quite sure what your problems is. But reguardless, get the Titanforged chest if you want to use the PvP chest. You are low on hit rating as well, so it will help.
Also, just FYI, don't gem dodge..... Gem agil/stam. They included it with the patch for a reason...
In all reality, you shouldn't be getting gibbed. There's really no reason. Maybe you are ranging your healers? I'm not sure... Reguardless, 10m ulduar bosses don't really hit that hard, and your gear IMO should be enough to survive for a while. Hell, I tanked kologarn 25m for a good 20-30 seconds while they were resing a tank who died and I was in DPS gear and spec.....
Biggest issue with your gear, is the lack of close to 8% hit. With Primal Precision, you should be at 5.25% with expertise, which is still under the soft cap, but shouldn't affect you as big with the respec. I still sit at 6.25% in my tanking gear, and I've tanked almost all the bosses below mimiron.