You should be using all stamina gems, except for one stamina/dodge gem. You should also be using EH trinkets and not avoidance trinkets. Get the Black Heart and the Glyph of Indomitability until you can replace them with something better.
Doing those things, you could pick up ~1800 HP and 1792 armor. That would up your survivability quite a bit.
Your spec is a little odd. I'd move the 3/5 of the points in Shield spec to your One Handed Weapon Spec, and the 2 from Imp. Bloodrage into Focused Rage. Also, I'd change the Glyph of Revenge to the Glyph of Devastate for better threat output.
All those are minor tweaks that could make a big difference in your survivability/threat output.