I finally 1CC'ed this game! I played extensively for a couple weeks then took a break...when I came back I 1CC'ed on my first full run, it was the first time fighting the TLB as well, though I knew the patterns from watching replays beforehand. It helps that it's not that hard, and really just there to boost your score.
-Because of the break I took I messed up on some of the easy stuff, and I completely forgot how Stage 5 went, overall I went for a more survival oriented run instead of optimization, I also skipped a lot of breaks on bosses on purpose to make it easier on myself. A score of 140~ million should be possible for me to get if I do everything correctly.
-But for now I'm not looking to improve my score, the devs have announced a Black Label version of the game and it's coming January 2018. I'm excited to play it when it releases to see what they managed to change! I'm expecting an overall harder game and greater scoring potential.