I don't sling flies for walleye in lakes. In river fishing, you need to be scratching the gravel. Sinktip or full sinking lines. Short leader. Clousers are good. My favorite is a white bunny tied Clouser style. Tie off a short tail, then palmer the zonker around the shank and up and over the hourglass weight, and tie it off. You don't need a real heavy weight unless you're in really fast moving water. I like fishing small inlet streams, casting downstream and bouncing the bunny up the drift. This probably isn't very helpful. It works for me. JGW