For walleyes, most of the time, minnow head it is.
When the bite is tough though, working the bottom with the raps and a SMALL live minnow is hard to beat. I hop the rap on the bottom, makes little clouds of silt I guess, then raise the lure so it's not on bottom anymore and pause. The rap is slightly off the bottom but the minnow is kicking up dirt and what-not and causes inactive fish to bite, sometimes. Also proved effective in community spots.
Manny