Yes DS is most definitely viable at higher difficulties. In fact if you're dual wield it is pretty much a "you're doing it wrong" if it isn't on your bar haha. DS-Quicksilver is the go to rune for that skill. It has other useful runes but the reduction in spirit cost is just so good most go with that rune. DS is even better in the PTR/Beta and is just fantastic skill overall. About the only time it is replaced for another skill is if you're swinging a big Ol' 2H'r. Then TR becomes the mobility skill of choice.
I'm going to cut and paste a starter pack in here for you seeing how you're a new lv60. Just keep in mind somethings like Life Steal (LS) and the Nirvana synergy are going to be fazed out soon by loot 2.0/xpac. So here comes a lot of info for you :)
The forum sticky is awesome :) Here are a lot of links from it.http://us.battle.net/d3/en/forum/topic/7004698754
[Acronyms and their meanings]
You can run MP10 for under 100K if you camp the AH. Spear-Chucker is an artist when it comes to the budget builds so look over his characters on his profile for more ideas. Check the budget gearing guides I linked below, he's the author of both.
Quick Tip: Craft, Craft, and Craft some more of all the special Archon recipes. The crafting plans are dropped in game as loot and can also be found on the AH.
The plans you want are...
Archon Gauntlets of Dexterity
Razorspikes of Dexterity
Archon Spaulders of Dexterity (and/or Vitality)
Amulet of Dexterity
Here is info on Monster Power (MP).http://us.battle.net/d3/en/blog/7540457
Here is a bunch of other good stuff :)
The "Rule of 5s" is the guideline to entry level MP10 survivability stats. The 5s are... 5%+ LS, 5K armor (w/STI passive), 50K HP, 500 res ( with or without OWE passive), 500K eHP (d3up.com is the go to site for this info).
Increase survival stats ahead of DPS stats. Get to the point you can take on elite packs without dying then work on increasing DPS to kill them fast. Then bump up the MP and start the process over again. As for the kill 'em fast part...
Try for 50CC, 500CD, and 3K+ dex. Add as much IAS as you want to get a good "feel" while attacking. Usually around 40% IAS feels right to many monks and other stats are chased after that.
A quick outline on gearing...
Check out this greatest hits of links from the forum sticky as well...
[200K DPS, 500K eHP]http://us.battle.net/d3/en/forum/topic/10490699702
[MP10 on a Budget]http://us.battle.net/d3/en/forum/topic/10196080038
[Duo Gen Bells]
Max XP farming:http://us.battle.net/d3/en/forum/topic/10307820683