So yeah my monk is OP. There I said it. Last night I just finished Act III in hell mode. (lvl 51) I have been running the same skills/runes since just about Nightmare mode and I am unstoppable. I even switched from using the Templar (I used him for his heals and taunt abilities) to the Sorcerer for kicks. The reactive heal and spirit regen is a tad bit too much.
So my setup is:
Primary - FoT w/ Thunderclap
Secondary - Lashing Tail Kick w/ Scorpion Sting
Defensive - Serenity w/ Tranquility
Techniques - Sweeping Wind w/ Inner Storm (I may try Cyclone when I unlock it)
Focus - Seven-Sided Strike w/ Pandemonium
Mantra - Mantra of Healing w/ Boon of Protection
Passive skills - Transcendence, Seize the Initiative, Chant of Resonance (the 10 min cast of mantra is great but I switch the third out for bosses with The Guardian's Path)
I also dual wield.
This build makes me nearly unstoppable and I can often chain pull non-stop. Just about the only time I get into trouble is when those dang treasure goblins are around and I am chasing them down. They really are the death of me! Whats even funnier is sometimes the Sorcerer has her "chicken" on cool down and she CC's him and its tap of the SSS for an easy kill, phat lewts all around!
(The other thing that normally kills me is I stand in stuff too much, My group, when I do group but I mostly solo, is always yelling at me to move!)
The gist of this build is for every spirit I spend I gain a heal plus the damage reduction. The type of gear I look for and am running is Dex > Vit > Spirit Regen > Int/ Resist. Once PvP gets here I know this build or even the Monk as a whole will get re-tuned because this a ridiculously OP setup.