Only thing I can suggest is switching your cloak enchant to 225 armor, switching the dodge gem in your chest to 30 stam, and putting a 10dodge/15stam gem in your shoulders. Other than that you should be good to tank ToC25, ToGC10(use cooldowns wisely though), Ulduar 25 normals, and anything below that level. With a few upgrades (such as legs and boots) you can push that up to being able to do ToGC25.
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