Agi is nice and all, but when I talk about avoidence gear I meant gear with +parry, +block, and +defense on it. There are nice adornements out there that can be added to decent dps gear to help cover both areas as well, the +parry for the forearm slot, the +% to parry wrist slots, and 1% sheild block one are all nice additions to any tanking sk. You can actully give up hps for avoidence. Even if you have 20k hps if your getting hit everytime a mob swings at you they'll just burn threw you, but if you can avoid 60% of the incoming atks you need less heals, and in turn losing a few hps here and there makes no difference really.
Overall, I think your gear is pretty good and you should be fine, just need to start in on the mobs before your anxious dps peeps in the grp beat ya to it

well cept your hate transfer they should be going to town and building some hate for ya as well.