I already mentioned to you the core skills, but:
Just LS and running around should clear you entire levels in 2-3 minutes each.
If you have nothing but an OP weapon. Feel free to swap in defensive skills as you need.
Rem, socketed weapon + Ruby. Everything else does not matter. a 150K-300K gold ruby should do you wonders. Surprising nobody told you rubies had no level restrictions. Just farm blue items on your barb, change them to essence and sell them for 1100 a pop. You should do it in under an hour. Join a pub game if you have to.
You could waltz through MP10 this way if you want. Look at mine Wiz, I have a ilvl 63 weapon waiting for her come level 42. Helps a bunch if you have a hellfire ring, but it is not necessary. Just makes things go that much faster.
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