There is two stories here, TL DR at the bot
One day we decided to run a random heroic, we get in on our mains (at the time ToC was end all) And here we are all decked out in 245's or better and we get into a Gun Drak. Our druid tank has a whopping 32000 hp and we're like "effe this is going to suck". We pull, the first few mobs die in seconds. We figure its us as the dps (hunter / mage / mage). We get to the boss and he died just as quick, and no one has pulled aggro yet, strange to us because we figure there is a gear gap. This dude as than bear tank, did 7.5k dps to the boss. we're somewhat in shock, so we check him out. Our buddy who is healing said he was cake to heal. He is rocking all 245+ druid gear, gemmed with agility, total cat druid in bear form. Look at recount, he dodge almost every attack, and kept up with the dps on the bosses. Was a fun run. It got me thinking, I want to try that on my druid, but she'll never get that gear.
Now that the PTR's are out, I made a pre-made druid. Full 245 teir, chanted agility or stamina, gemmed all agility, armor tanking meta gem. My druid is sitting at unbuffed(bear form)
34k hp; 32k armor (67% reduction); 48% dodge; 58% crit; 6.6k AP. Now then, she is missing full raid buffs, but as is her savage Defense absorbs 1500, she crits almost every hit so its up if not every, at least every other attack. If the Death's Choice procs, she goes up by 3% dodge and about 3% crit. In a raid, she would have fort / kings, at least 40k hp (more in icc lolz) But she'll have to be close to 55% (35 in icc :\) dodge, and will be close to 62% crit.
So why do bears not stack agility? Even with all that reduction are bosses just hitting to hard to make it viable, does chill of the throne just rape to much? It really just seems strange that druid can do so much threat, and have so much raw dodge for them to not want to do that.
TLR
Why dont tanking druids stack agi??!?!!?!111!?!