Well, I typically jump around until they fire, then kill them in a couple seconds. But there have been several times when I just walk out into the open on Pentagon and gun down all the PR users. Of course, most people aren't very good.
I've also found a double armor Strike Rifle to work incredibly well against Phase Rifles; just ask AISP.
Hmm, interesting thought, I'll try that sometime. lol
Creativity, More, Often. K I L L, a Conduit 2 Dualtage, IS OUT, check it out here: http://www.youtube.com/watch?v=pDQMWdPctqc