Well, in order to rank this you'll need a lot of remapping lol which it seems like you got started on. Personally, I'd decide based on how much you like the song; if you really like it, I suggest practicing with other maps so that you don't get sick of the song or tunnel vision on one mapping concept for it. There's no problem with "jumping ship" to practice mapping and improving with many different songs and then returning once you can rank stuff.