Dangit! Foiled again. (reference to Smosh Crybaby and the fact that I've lost this gold 3 times now)
My route is obviously no longer the fastest route, because I don't see anywhere to gain a full second using my route. It took me 3500 tries to master the left wall climb and get my 17:44 run.
I know what to do now, but haven't been able to land it yet. Another 3500 tries should do it.