In any case, I've seen a lot of screenshots of people who are successfully farming A3/A4 as well as posts of people who are saying "Why can't I get there even though my gear looks as good as or better than yours?"
The common thread tends to be:
-- too much HP/AllRes, not enough armor (every successful build I've seen involves 6k armor minimum; too many fail builds have like 40k or 50k hp with no mitigation)
-- too much HP/AllRes, not enough DPS (every successful build I've seen involves a minimum of 14k dps unbuffed; too many fail builds have like 40k or 50k hp with like, 10k dps)
-- or, the complete opposite -- too much dex/DPS (like, 1600 dex WTF?), but no resists and no armor
So I'd say for Act 2, shoot for 25-30k HP, 5.5-6k armor, 500-600 res, and then focus on improving your DPS. And for the love of god, use a skill build that's tailored for A2 and not for A1 or A3/A4.
The thing with AllRes is that it's nice to have for increasing your margin of error (like dodging those mages in the ZK tombs), but lack of it can be somewhat overcome with skill (in A3, with the fallen shaman and birds, you very quickly learn to dance/dodge fireballs even while surrounded by melee). But you simply cannot overcome the physical damage you take for being in melee range or the fact that you don't do enough damage to take out elite packs 1 mob at a time before you either die from an unlucky hit or from the enrage timer. That's where the gear check portion of the Acts come into play -- if you can't take a hit from mobs that aren't supposed to one-shot you (but under reasonable circumstances are supposed to hit you), you are either undergeared or improperly geared. But if you're getting hit by stuff you can and should avoid (wasps, fireballs, red and green stuff on the ground), then that's just a matter of skill.
This post was edited by irimi on Jun 7 2012 12:35pm