Track Type: Bagging 
Best Shock Spot: At sand dunes in middle section The track is almost entirely shortcuts. Try to make your comeback on lap 3, but keep in mind this is when the shock tends to happen and dodging it can be quite powerful. The ending shortcut can also be done itemless with practice.
Arriving from Mario Bros. Circuit, Crown City, Whistlestop Summit, or DK Spaceport
Track Type: Bagging Best Shock Spot: Beginning of final lap The reverse variant is also pretty much entirely shortcuts. A golden mushroom is really good here for the ending shortcut.