So much bad advice here, I don't even know where to begin.
Necrophobia has the right idea but the wrong way to do it. Innas temperence is what you eventually want for 0 dog. I'd recommend you go for a high vitality set instead of the int set. For the same price as you paid for yours you could have 160 vit on the pants and then gem for the 100 int. The way you did it you only get ~100 int and 100 vit.
B25HLG is talking about composite build where dogs refill mana not health, a 0 dog wd DOES NOT use acid rain or bears. He has a ludicrously good Skorn so I'm sure his build works for him, but it is not what the OP is asking for.
Chadbrochill, you must have 2 sets of gear since you've got 0 LS in your current set. TBH I don't know how you survive mp10 with 35k HP and would bet you're playing with a freeze wiz (or you're running some LoH/freeze Acid Rain build) which is a completely different situation than somebody soloing MP8 trash. I also don't know too many WD who have 10:1 armor:AR ratio. I'd like to have something like 4k armor and 800 AR unbuffed which is 5:1. Maybe a Barbarian with passive armor bonuses and stacking str instead of int could get 10:1...
Gold15 and Ante provided good advice if you're dying. It is a more defensive setup but will get you started.
ImpKing also has some good advice forwarding you to heyguyslol. I'd imagine he's got >10b of gear so you won't be copying him any time soon but its something to shoot for. That said, he knows the build and can probably help you out.
Here is my personal opinion having gone through what you're going through now. Your gear is bad. You have zero business going into mp8 with 50k dps regardless of your build unless you are only there to spawn globes for players with real dps. While not a requirement, I also highly recommend some LS on your MH, it will help with those annoying trash deaths when you get unlucky and don't spawn a globe for a few seconds. To farm mp8 I'd recommend 800+AR, 4k armor, and 100k unbuffed dps. I personally don't solo mp8 to farm because it isn't efficient. I might change that in 1.07 when they buff the exp and add the demonic essences but I'm not certain.
You could go 3 pc zuni set for the 130 int and 55 AR bonuses at the cost of some attack speed. You can get a decent pair of zuni boots with AR for cheap and all Zuni Pox and Marrow's have AR so you could eventually get over 800 going that route. Even better if you get a zuni chest with reduced dmg from elites, ranged, or melee on it. Once you have a solid defensive foundation, then you can start working your attack speed back into the picture and climbing MP levels. Right now for your gear I'd suggest MP5 or find a nice freeze wiz and vengeance DH to play with if you want to play a higher level.
FYI, with scoundrel I'm at 92k dps, 2.15 attacks/sec, 54k life, 3.5k armor, 10% reduced damage vs elites, and 722 AR. These numbers buff to 177k dps and >1000 AR with 5 stacks soul harvest and GF (which is a large percentage of the time). My gear cost approximately 1B gold or so, and I basically stole the chest for a paltry 500k, the helm for 9m, and the ammy for 28m (paid full retail for everything else :). I can solo farm MP10 but it is painful and am far more efficient at mp6 which is where I usually solo. I am trying to get 2.5 attack speed, 4k armor, 800 AR, and 100k+ dps as I suggested to you. Hoping with new crafting I'll be able to get some nice gloves and an amulet, and then hopefully with how good the bracers are the price on a good set of Lacunis will drop so I can upgrade mine to some with some CC.
Edited by SilentMike69#1275 on 2/11/2013 7:52 PM PST