I'll just tell you what I do, and it works pretty good for me.
I focus on Dexterity and Vitality for attributes, obviously -
Then I start looking for crit, high crit chance and high critical damage. Then attack speed, only if it doesn't take away from my survivability (ie, I wont take 5% attack speed if I lose 70 resist).
Then it's just resist all + resist of choice with the 'one with everything' passive skill to give a lot of defence.
I dual wield, and I try to find weapons with Life on Hit and Critical hit damage (right now my weapons are something like 200 dex, 850 dps, 85%+ crit damage, and one of them has 770 Life on Hit).
If you die too easy, use Mantra of Evasion + Hard Target. If you have resistance around 500 or so, Mantra of Healing + the resist bonus rune isn't a bad idea either.
Other than that... I'd say experiment and see what works with you -
this is how I am currently running