Does anyone use a medium power fast tip spinning rod for crappie? I know they can be caught on one successfully due to catching them myself while bass fishing, but I'm not sure if a rod like this will cover the actual techniques used for crappie fishing when done the right way.

I currently have a 6'6" M/F spinning rod with 8 pound mono line on it, and I could put 6 pound on it if needed. But I was thinking of buying a new one to set up just for crappie so I keep my bass rig as is. Also was thinking longer is better for some reason, so I am looking at a 7' rod, and either a M/F or ML/F power and action. Specifically, the Shimano Convergence rods, paired with a Pflueger Trion Tri30x or Tri25x reel.