http://eu.wowarmory.com/character-sh...moon&cn=Vadica for reference.
EDIT: Okay, looking over your gear the most obvious is gems. All gems should be 30 stamina except the one in your helm, which would best be suited by 10 dodge/agi/expertise and 15 stamina, only to activate the meta bonus. Enchant cloak for 225 armor, gloves for 18 stam or 240 armor, chest for 275 health, because 10 stats will never scale enough to make it worth it. Weapon chains are nice, but you don't need hit and ICC bosses don't disarm, so use mongoose or blood draining.
Your spec needs work too, use http://eu.wowarmory.com/talent-calc....12521030113321 instead, and change your glyphs to shield wall, devastate and swap out taunt and blocking for taunt fights. Minor glyphs are fine.
Since you have imp rend in your build I'd imagine you rend in your rotation? Don't, wasted gcd. Your priority system should be Shield Slam > Revenge > Shockwave/Devastate, with heroic strikes queued all the time when you have 40 or 50+ rage (normally all the time).