End Game: AC vs. HP

[heartbrand]

I've seen lots of contradictory posts about AC after 1100, hp etc. For the min-maxers here what is the deal, what is the best for gear for 60 end game tanking? For example, is HP the king so much so that I should wear the 30hp and 20hp wrists and arms with minus agility and low ac from HS? Or is it the extreme opposite and full cobalt trumps all HP (assuming a non resist fight). SSB over Cobalt Helm? INQUIRING MINDS NEED TO KNOW