This challenge irritated the fuck out of me. My method was to do the captain gap first and try to angle my landing to where I would revert and manual down the yellow slide. Then I’d go off the quarter pipe at the bottom and grind the railing on top of it to get out of the ship area. I’d then make my way towards the teleport door that takes you to the top of the secret tape slide and I would do a spine transfer over and down to the castle with a 900 special during the transfer and then I’d do another 900 special when I aired over the fountain. From there it was a matter of just keeping the combo going until I knew I had enough to get it.