First of all you are not at the defense minimum, run normal HoL and get Seal of the Pantheon - Item - World of Warcraft from there. AN hc also drops a good stamina trinket that you could try to pick up before you get the stamina trinket from ToC normal.
Apart from trinkets the pieces you need to replace first are your cloak and chest since these are dps pieces.
Replacing your lvl70 ring with a lvl80 one with defense on it would also be good.
And enchant your gear properly and you will see both your defence and health shoot up.
Oh yeah this : http://www.tankspot.com/forums/f97/4...ear-guide.html