rotate complex angle

I am computing phasor values of voltage & current waveforms at each sample point along the waveforms.  I want to plot all of the resulting phasors, aligned to a-phase voltage.  To do this I simple need to multiply each phasor by unity at an angle that is the conjugate of the a-phase voltage angle at that point.  

Is there a way to create a polar shift operator 1@-arg(Va)?   

See attached Prime 8 file for how I'm doing it now (multiplying by the conjugate of Va and dividing by its magnitude).

thanks,

russ