5-4 100%

Tutorial 100% 5-4 Tutorial: https://youtu.be/TpVFmRG1giE

IL WR 100% 5-4 IL WR: https://youtu.be/w3ENAal2EB8

Potential time-save - grab the star cloud at the top of the stairs to skip the 2nd mid-ring: [1]
Potential time-save - skip this [2] red coin and duplicate an extra during 5-4 skip.
Block break red coin comparison: [3]
Not slowed down: [4]
Alternate spike shots to make red coin dupes easier (if you're not doing 5-4 skip): [5]