I've moved onto 4 witchdoctors and I'm doing fine in act 3 now, even with the stealth buff to affixes. Basically if you have to take hits you're looking at 250M +++ per character to gear up, more around 350M+++ if you want to not have to kite like a madman. Damage is everything and a really high dps LOH weapon is insanely expensive, needing 4 of them is extremely unrealistic. Basically 4 melee is not worth doing in my opinion. The game is broken on MANY levels though, I have never seen or heard of any team doing farming runs with more than 2 people. I've seen some mediocre attempts with 3, but zero 4 man farm runs without having 3 ranged + 1 tank. NOW? I don't know of anyone who does anything with melee in act 3 with the stealth buff that isn't either constantly kiting desecration as monk, or using the extremely OP Barb skills (LOH WW Barb).

Either way; this is a perfect example of what I'm talking about; http://imgur.com/a/RW8QA (That's not even act 3... You get stuck on mobs like that in act 3 you basically have to quit now, losing your 5 stack in the process...)

Minions + Desecration (or arcane) + 4 man = uninstall worthy, especially since the stealth buff to affixes. (Note the screenshots above were with 1 person only, hence the follower)

I don't know what blizzard was thinking with so many aspects of this game. I really genuinely want to enjoy it, however there are so damn many road blocks and/or lack of gear on a regular basis that I'm finding it extremely hard to maintain any level of genuine interest in even logging on anymore. I was hoping quadboxing would resolve this for me, however it's basically just 4x the moneysink (gold)... =(