There are some things you should tweak/change but either you're not using cooldowns properly or whoever is healing you is full of crap.
Gloves: 18 stam or 240 armor
Chest: 275 HP to chest is better
Shoulders: The 30stam/15resil enchant is better
Armory is slow at work and I'm tired of digging through them, lol. The spec I have is the cookie cutter spec, just click the picture in my sig, it's linked to my armory profile.
Shield block is very powerful, the proper/proactive use of this ability is very underrated and imo can make the difference between a good tank and a great tank.
You don't need a CD rot for saurfang really. You do for festergut. Shield block -> Last stand (these may need to overlap if you get low) -> Shield wall -> trinkets+enraged regen + whatever other CDs you have left and/or healer CDs.
Also: put blood draining on your weapon please.
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