First figure out your dual wield success percentage.
DWSP = (Dual Wield Skill + Level) / 400
Next figure out your damage bonus
DB = (level - 25) / 3
Calculate the DPS for each weapon with the DMG bonus only on the main hand.
Primary DPS = ((DMG*2)+DMG BOUNS)/DLY
Secondary DPS = (DMG*2) / DLY
Finally put it all together(DWSP is dual wield success percentage from earlier):
Primary DPS + (Secondary DPS*DWSP)
(PDF Warning) All formulas are not mine and I gathered from the monk spreadsheet at
https://drive.google.com/file/d/0BwL...JtaGVsanM/edit
If somebody sees a mistake or knows better please let me know. I am tired of the old wives tales about weapon order and this is how i have been calculating it.