Seeing a few issues...
Change your gem in your helm, gloves, belt - Do not gem for Int, pure Def (unless way below cap), or Str. Str is a tank stat only if you have a BLOCK set of armor. Int does nothing for your tanking (would mean you want to be an OT for AN in ToC Raids), a pure Defense gem does nothing for you with your current defense, other than a loss of Stamina.
Change your weapon enchant - Get Mongoose or Blade Warding.
Get the Glyph from Triumph Emblems or farm the Essence of Gossamer to replace your Alchemy trinket.