Crappie will hit any bait that resembles bait fish. Speed can affect the bite more than anything in my opinion. I've see folks use rattle traps, bandits, Big O, and lots of other crank baits trolling Nimrod and the river. Some just troll jigs and do good. Remember line diameter affects how deep a bait will run. Not all lines of the same lb test are the same diameter. I was given some new Stren flouro 100% florocarbon in 8lb test. It is larger diameter and way more visable than the Berkly Vanish line I been using.