Hey Lightsan,
I have 4x WDs and I can farm Act 3 Inferno. I do die at times, so it's not like a faceroll farm run, but I'll kite tough packs to spawn points to clear them if I have a problem.

My gear is okay, but not nearly worth more than 10mil on 3 other alts, my main guy has maybe 30mil worth of gear at most.

Just last night I went through Keeps Depths Level 1 - 3, got 5 stacks, killed all the elites I could find. Then went on the bridge, killed packs, went into the storage place, killed a pack. Then killed Seigebreaker. Had a bag full of rares at the end. Seigebreaker is a 1 shot, but I do hit his enrage at when he's at about 10% health or less.

I also can pretty much just keep AOEing everything without moving much at all. So I'm not sitting there kiting everything around the map. Which is huge.

This is on 4x WDs in inferno.

I then went to Whimsy last night and cleared it twice, but it was a bit painful. Died a LOT - probably 3 full repairs worth. But I did find a recipe that sold for 30 mil in 6 mins.

I finally found a spec that works for me - I always thought a CC or pet build would be the key, so I've always looked for that gear. It's actually pretty cheap:
http://us.battle.net/d3/en/calculato...jdQ!ZVU!aaacaZ
On one of the WDs I take Bad Medicine instead of the damage reduction, which gives monsters 20% less damage when you hit them with poison.

Here is the key (At least if they don't change anything - this worked as of last night - after the hotfixes where they fixed that monk exploding fist thing):
Stack LoH - at least 1k per guy
Stack CC gear, stun and freezes - at least have 10% per guy between the two. (I actually probably only have 4% stun, 4% freeze on each guy, with another 2% on one or two of the offhands - so maybe 36% total)
230-300 resist all is what I currently have. I'd like to get it higher, but the gear cost too much.
Mojo, Weapon and Helm all must have mana regen - which will put you at about 50 mana regen ( I only have 40 on one of the guys)
DPS is 39k, 28k, 24k, 26k with no buffs
Each guy has at least 30k hitpoints: 32k, 30k, 32k, 34k
12% movement on boots is nice when you have to run out of an AOE. Also I bought some cheap level 44 pants that give 7% movement speed for my guys.

I have Big Bad Voodoo on round robin, it gives mana regen. All the other skills should be on cooldown 100% So you get 300% mana regen.

I basically just spam acid cloud in packs, and grasp when it's up. Make sure all your guys are aligned so that it's hitting the elites directly in the center of the cloud. With all the CC gear, it stuns and freezes all the non-elites, and elites it usually will stun them most of the time - so you can sit back and just keep spamming acid cloud.

When I hit a elite pack, I hit one of my BBV on round robin, it gives me more mana and I can spam acid cloud big time. Hopefully everything will freeze or stun, but it's not perfect, so you might have to move to avoid arcane or molten. Just takes a bit of practice on some elite packs. Some packs are much easier to keep cc'd than others.

Anyway, that works for me right now, and it's a fairly non-bank breaking gear-up.