I watched these videos (well, sort of) and was inspired to do the same or similar, but in the end I just couldn't get close enough to his stats to comfortably make it through Act 2. I have 690 All Res, 6.8K armour, and just under 30K health. The lack of health is what I'm most disappointed with, but with only 5.9K damage as it is, I'd rather not swap STR for VIT on the couple or so items I have that lack it. I have a pretty crappy shield, though, which doesn't help either.
To be honest, with the mates I play with, I can get through Act 2, but it's tricky in places and we have to skip those occasional Elite packs with absurd ability combinations. Still, at least I'm relatively happy with how little I spent to get to where I am.