Crippling Wave > Concussion
Sweeping Wind > Blade Storm
Mantra of Healing > Circular Breathing (I like going into fights with full Spirit; Boon is overall better probably with how much you'll Mantra spam eventually).
Breath of Heaven > Infused with Light
Cyclone Strike > Implosion (Group with Wizard and WD primarily so it's useful here)
Serenity > Ascension
Transcendence, Seize the Initiative, and One With Everything for passives. Dual Wield with Life Steal and Life on Hit for the weapons rather than +Damage.
The only real DPS increase you get from DWing is because you have more Spirit to spend. Granted, that's the majority of your DPS but Shield Monk is better survivability, no loss in per hit damage (most likely greater), and you still have good Spirit generation via skills. That said, with enough Spirit regen, I'd probably DW for the skill spam in the end (so, basically, you were right Opiate!)
Monks get to cheat with Seize the Initiative giving +1 Armor per DEX :x