This is one of my favorite things to do. The best fly ever is the Reynolds Pike fly. I tie it using a craft store heart bead for a head. When I started doing it that way, and using 5 minute epoxy on the weed gaurd, it left no exposed place for pike teeth to tear up your fly. It is bullet proof, it has a motion that drives them insane and it does not matter what color they are as far as I can tell. This is one of my favorite colors, not because they like it, they do, but because it is easy for me to see fairly deep.
I tie them in a lot of colors. If you want a complete step by step let me know and I'll either PM you or post it in patterns.
I also tie Dahlberg Mega Divers. I don't think they work as well as the Reynold's Pike fly, but it is more of a thrill to see a big fish come up and nail a top water fly. I stack deer hair when I do these so they come out looking pretty fancy, one color heads, or multi-colored bands work just as good. Pike are not a real picky fish.
I have also used a kind of Reynold's/Dahlberg hybrid with pretty good results also. It has a different dive curve than the Dahlberg, but does not run real deep like the Reynold's.
I use a leader system where The butt section is 36", with a perfection loop on the end. I blood knot it to the mid section which is also 36". I then make a bimini twist. Then take the double line and clip the end of the loop. I secure the single end in a fly vise or something so it cant spin, and then furl the double line, but not to tight. I leave it fairly loose. Once it is furled, tie and overhand knot in the end so irt stays furled. I then take a piece of nylon coated steel leader and bend a U in one end. I take the double furled end of the bimini and the U in the steel and tie an albright knot to attach them. I tie the single line end of the mid section on the leader. To attach the fly I use a knot called the twist melt. It is exactly what it sounds like. put the leader through the eye, twist it up for a couple of inches and melt the nylon with a lighter. I have never had one come apart. This is a pretty good leader system, so if you have any questions, PM me or post them here. I even use a spey rod for them. I can toss big stinkin' Pike flies more than 100' every single cast with one. More fun than should be legal.
P.S. Musky are Pike's YOUNGER cousin.