Avoidance vs Stamina, the correct balance?

[picsam]

Hey ladies and gentlemens,
I'm having a few problems choosing my gear as what I should be aiming for. Up until now, I've been aiming for stamina > avoidance, simply because it appeases the pugs I run with. Last 2 raids I did, some healers told me I was squishy, and I was indeed dieing pretty fast sometimes.
Here's my armory:
The World of Warcraft Armory

What's the common total avoidance vs total health most tanks have to run Toc 10/25, Ony 10/25 and Ulduar? Right now I'm standing at 49.33% avoidance, and 34.8K health. Any idea?

[Omok]

From what I see of your Armory profile, you're lacking in armor. Your avoidance is fine, probably the same as mine or better. I tank 5/5 25 man TotGC with less avoidance than you, and have no issues. Work on increasing your health and armor and you should be fine.

[picsam]

Thanks for the advice. I compared your armory with mine. Your avoidance is pretty much the same, slightly over mine(like 3% above). That difference comes simply from the gear so I shouldn't worry about gemming for avoidance. I guess I'll get more armor simply by replacing those few iLevel 200 I have, like my shield. I'll try to get in a few lower raid to replace those.