Lets play with the thought for a while.

If you get ~60 all resist on every item. That's 13*60 = 780 all resist. 80% to that would be 1400 all resists.

I got 2600 armor atm without a single +armor item. Lets say we got +250 armor on all 13 items. That would give around 5850 armor. Together with energy armor and Archon thats 12 000 armor.

To top it off, lets say on every item we also had 150 vit. Having all 3 of these attributes are not too hard to find. So 13*150 = 2000 vit. 1 vit = 35 hp, and you got 5000 hp without any items. So he would have a total of 2000 * 35 + 5000 = 75 000 hp.

So a Wizard could very possible push himself to:

75 000 hp.

12 000 armor.

1400 all resist.

I have a feeling this person would be able to tank most things in Act 4 Inferno.

Armor damage reduction:

http://i.imgur.com/V6jU8.png

Lol no

That would be able to tank a few minor hits but smal mobs. Anything big will still hit you at 40K dmg in act 3 and 4

Then how am I not dying to things even with 200 resist 2600 armor and 30k hp?....

EDIT: I just logged in to check.

I got 47% DR from armor, 44% from phys resist. And the mobs at start of act4 hit me for 26-28k. I went in and tried 5 times. (Screenshot: http://i.imgur.com/XNmqq.jpg).

That means if I had 0 armor it would hit me for 28k / 0,53 = 52.8k dmg.

If I also had 0 resist it would have hit me for 52.8k / 0,56 = 94k dmg.

So without resist the first act4 mobs hit for 94k dmg. With the tank build I suggested that would be 94k * 0,2 * 0,2 = 3,7k dmg.

Please correct me if my math is wrong.

If my math is correct the tank build I mentioned could tank ac4 fairly easy. Even the opressor charge that does 220k with 0 armor/resist would only do around 8k dmg to you. Which is nothing with 75k hp.