I play in heavy armor (ada body actually) with a tower shield AND avoid getting hit, especially when there is a champion around. In addition, death aura keeps me near max health. I'm not uber raid soloing superman like many posters (whom I hold in very high regard). In fact, I don't even consider myself that great a player... I have to rely a lot on having a build that can survive the mistakes I make. But you don't have to take my word for it, I post EE videos on a regular basis. The last two EE videos I posted were just after champions were introduced and before they got nerfed.
All that said, I am now curious if the immunity to critical hits feat stops fortification bypass... giving up positive healing wouldn't exactly be much of a worry for me
If you want to wear pajamas then you can't act like a toe to toe tank. If you want to act like a toe-to-toe tank, then you need to modify either your build or your gear. I don't see the problem. The "real" toe-to-toe tanks now have way more than 1000 hp.