FWIW, my main pally tank is Ret off-spec and I've never found any way to make a 2-step macro setup in ISBoxer that gives any decent dps.
Since I only box the toon as Ret during LFR (with all toons as dps), I end up driving from the pally and manually clicking on abilities while I'm mashing button 1 to do DPS on my slaves. I use CLCRET to tell me which ability to click.

/wave Flight
<--- Alumriel, Bard, Bristlebane, Arch Overseers =)