I'm also stuck on the second half of Act II on Inferno with my DH...there's difficulty spikes within difficulty spikes XD.
I'm buffing up my Barb to 60 now, got a couple All resist equip on stash for him (farmed from Act II or crafted from BS), so probably he's going to give me a more decent approach for Inferno xD. Also got a 700 DPS 1H stashed away for him, with 100+ to STR and VIT as well .
Probably looking into 40 - 45K HP, 8K armor (with the right passives) and over 300 resists once I hit level 60. And about 20K DPS.
Edit - Oh and Act II is ridiculous for a WD. Not because of the enemies damage, that I can live with, but because I can't find any strategy to take down enemy mobs fast enough. Zombie Bears is a no go for Act II and onwards, Poison Dart with CC builds are a no go (too slow to take down anything) and Dire Bats is just too mana expensive to leave any room for manuverability (even with Vision Quest).
I've taken down a couple of champion/elite mobs with the Poison Dart build, but it usually takes me 5 - 10 minutes of kiting, even with the most simpler of champion mobs. And let's not even talk about Dune Thresher mobs...there should be a limit as to how many times they're allowed to go underground, that shit is ridiculous.
Current PC Build
CPU - i7 8700K 3.7 GHz (4.7 GHz turbo) 6 cores OC'd to 5.2 GHz with Watercooling (Hydro Series H110i) | MB - Gigabyte Z370 HD3P ATX | Gigabyte GTX 1080ti Gaming OC BLACK 11G (1657 MHz Boost Core / 11010 MHz Memory) | RAM - Corsair DIMM 32GB DDR4, 2400 MHz | PSU - Corsair CX650M (80+ Bronze) 650W | Audio - Asus Essence STX II 7.1 | Monitor - Samsung U28E590D 4K UHD, Freesync, 1 ms, 60 Hz, 28"