You can't cycle Roadrunners. Just sayin'. :|
Well I guess you never have a real stable one... but yeah.... You're kinda right but you may be wrong. I dunno for me a 175 RR is pretty stable haha.
The point of a RR cycle isn't like beating in a FB to a roller but more knocking off the new. It's nice to have a seasoned backup. It's not a 1 mold solution but you could cover straight to anhyzer with a couple real well.
It's a lot like a Comet cycle, you start out with say a less stable one 170X, a medium like a 174esp, and a stable 178Z. It gets you what you need now and you use each disc until it's squirrelly in its slot then move it down. Or like in my bag usually a 176 domey something and a flat top 172 (with a shoulder,probably yellow).