I think it takes more skill to make to play in single player than it is to play multiplayer.

I say this because, good replay makers spend hours some times days on one replay trying to perfect it. There is much to do, you need to control flow judge hits and deal figure out what moves to do that compliments the one you did before. Not only that but you must also judge what uke does. Even though he isn't doing anything you must judge what you want to do after you get a boom hit.