Ending rail shortcut
A complex end-of-lap sequence: trick onto the railing, left trick between the yellow lines, brake, aim at the wall bump, get a high shake-trick off the wall and land on the teal railing, then hop wall-to-railing to finish. Faster than even the mushroom shortcuts and 100% consistent once mastered; an alternative green-sign-clip method is simpler but relies on an inconsistent boost.
Fast left-rail line
Trick off the yellow railing and the platform edge, wall ride the rock and trick off it onto the left-side railing for a small turn skip. The easiest cut on the track but also the least necessary - weigh risk versus reward.
Bottom mushroom shortcut in the final section
On the fastest final-section route there is a mushroom shortcut at the bottom; the whole path is very difficult and needs slow-motion study and practice.
Super mini-turbo gap jump
After the second item set, soft drift for a super mini-turbo, release it at the shadow and charge jump over the gap; even with a rough landing it is much faster than going around.