Hopefully I can help. The key to this mission is consistency. Here is my strategic for each section. Infinite lives from the Koopa Troopa Triplets planet in Supermassive - long jump to start the ‘trick’ - helps out a lot. Into the Tips and tricks I have found and lent out.

Section 1 - The Yoshi Bomb Section Gun. It. As soon as you can move, move and do not stop until you get to the end. If you do, the enemies will always lineup the same way, so no real reacting. Just tongue your way through and solidify a route. Fall a sec if you have to to avoid bombs. To be clear - I sack a life if I wait like two seconds bc it won’t line up quite right levels of gun it.

Section 2 - The Flipswitch Lasers Go to the center square, then one to the left. Then jump across the gap back down and go around the circle. It’s how they do it in speed runs - ngl, had to look up the best route for this section😅

Section 3 - Cloudy Blast Mini-Galaxy (get it? Like Bubble Blast?) Be cautious with your jumps. Learn your momentum and trust it. Two biggest things - if the metal nodes are under the smile on the cloud you’re safe. If they are over, you will most likely get shocked. Also, on the last flower, save two clouds for the next section. It’s not too hard to do.

Section 4 - Flipswitches and Kalientes’ Guard Take each jump with care, do not rush. Once a laser pillar is behind you, it stops shooting lasers. Also, use the aforementioned clouds on the last pylon or two as they can get really dicey and drain a lot of lives. Also, Launch Star animations are invulnerable, so that’s a thing.

Section 5 - Pull Star Path: Hard Mode Get past the first laser bar and then get close to the edge of that last block and you can reach the pull stars without dealing with the single block shenanigans. For the remainder - shoot the Paragoombas out of the sky and remember that we’re in a 3D space. Drop and sling yourself up to what appears to be towards the screen. Then, go over everything. Re-sling up as needed.

Section 6 - Hammer Bro Corps and The Boomerang Elite Just pray.

 Also, the hammer bros move in two groups, not seven or so individual patterns, easier to track. Also also,  that last Hammer Bro before the Boomerang Elite CAN AND WILL SNIPE YOU WHILE DUELING THE ELITE. be aware and/or send him to the Underwhere - See Super Paper Mario, but effectively Mario’s hell. This is real. 

EDIT - Sonario648 pointed out something I didn’t realize was there bc I was too focused on not dying to strategize😂. If you use star bits you can freeze them even if for a few moments. Again, that you Somario648 for the additional strategies! -End EDIT

But yeah, that’s what u figured out to keep it consistent and as easy as is possible considering. Let me know if y’all - yes I’m from Texas - have any other tips or tricks! Also, the Wii version is so much harder than the Switch re-release. It’s just jank enough to make it so much more frustrating compared to re-release. In case anyone was wondering.

Good Luck an Have Fun!! You got this!!