For northerns, I use large Rapalas and Williams whitefish, also Storm and Swim Whiz. My plugs and spoons are BIG, as I am dealing with pike in the 20 to 30+ pound range. An 8 to 15 pound walleye will also grab these offerings as will the lake trout. Some of the jointed ones are for bluefin tuna. Pike will eat something a third of their body weight. An 8 pound bass or 10 pound walleye is lunch. Small spoons and plugs = small fish. With pike and musky, bigger is better.