For monk, you need these DEX / IAS / CC / CD

To answer your question, no, DEX alone can't deliver high damage.
Put it simple, IAS/CC/CD contribute damage too

In short, you need them all.
As we push our DPS more than 200K DPS, I'd say we push DEX/IAS/CC/CD as high as possible.
We need to have all of them.

Based on current 200K+ DPS build, generally you need to have 2500-3000 DEX / 50% CC / 500% CD / 60%+ Attack Speed (dual-wield).
Godly specs are such as 3200+ DEX / 60%+ CC / 600%+ CD / 78%+ Attack speed (dual-wield)

DarkNite

that would be Crit chance and then Attack Speed...actually if u use D3up.com, from there after u insert your BTag# and your profile loaded, u can see the DPS increase for every point increase for CC%, CHD%, IAS%, Main Stat, Element Dmg % & etc...its on the right side after u load your profile in D3up.com...try it fren..

AH and RMAH Favour me a lot than RNG!! lol   

You mean gears are expensive now?

Yeah, the price has increased these few days.
Many godly gears were dirt cheap 1-2 weeks ago.

190+DEX 6% cc at 2b.
This kind of gears used to sell 5-6b.

present me bought 1 couple weeks ago.

Mempo with 4.5% was selling 400-500m 1-2 weeks ago.     
The price was all time low.

I think price has gone up this week since most of the gg gears already sapu by people.

godamit! i never find any nat ring in my life!

Got these instead.. and few more sucky dps