I use about a 32", medium action frabill ultra ice graphite rod, with a shimano sahara 1000 spinning reel filled with 6 pound mono or fluoroclear. Walleyes don't fight all that hard, so six is as heavy as you need to go when using #3 or #5 jigging raps, or spoons up to 1/4 ounce. However, heavier line for bigger swimming lures when fishing in shallow water works better to give your swimming lure a better swimming action. Twelve pound fluoroclear or mono is best in that situation. Other than that, six pound all the way.
Tyler