I think you can think about skipping the early YW here, but only if you bane with Courtyard, in order to get to your BV/Wharfs/KC fast. I also don't like Silver here, Silver can't get KCed, you don't want it here. You also need a YW somewhen (although your deck never came to the point), because you want to catch up on Curses by KCing the YW.
I think amalloy also got reasonable lucky here with the T7 KC-Wharf connection after T6 KC. I felt the KC was too early watching the video, but well, you make your own shuffle luck. But with just two other actions in the deck that could as well have been a dead KC this shuffle. Even with the connection T7 is lucky, could have well been T8 or T9 with the same chances. And with Kinging Wharfs that makes a huge difference.
The rest of the game, Sabbing him to death is of course a possibility, I think I would have taken 2 or 3 Highways before that, with trillions of buys saving $2++ on all these power cards this pays of in 1 round, in case he catches up you can still get (the now cheaper) Sabs to put him back to the ground.