Its funny. When I went to click macro's I simply used my normal button mashing on the target dummy using one dot as a "timer". Found out pretty quick that my button spam rate was around 7 per second. So, 7 commas per second of delay in all my click macro's and "voila".

Haven't looked back. I'm sure my timing isn't perfect and when I have to do something else with my left hand other than spam "2" (my dps button) it get's "off track". That said, my shaman using a /click is always outdamaging my mage who uses a cast sequence.