An unarmed monk probably isn't as viable as it could be, thanks to the cap of 100 on Strength which will limit your damage. I have never played one myself, so here is how I would build a Monk:
Stats: Lots into Strength, A lot into Dexterity. Some points into Spirit and Vitality if you need them.
Unarmed = 13
Whirlwind = ? (maxed this adds like 500 damage, and with a short cooldown it could help)
Rush Attack = 1
Fatality = 13+ (Max this so you can instantly kill enemies when their health drops to 50%)
Battle Rage = 13+
Thousand Strikes = 13+
Mana Leech = 1
Evade = ? (For a monk you probably want to try and max this)
Reflect = ? (not a high priority)
Death Blow = 13
You probably won't be able to afford many points into other skills, but perhaps Blind, Fear, Curse would be worth a look to help with crowd control.
For someone in unarmed combat, I would focus on stacking up damage enchantments on jewelry, as many as you can get without using up Malachite Gems recklessly, and Life Line and Spirit boosts on armor.
