Ok so I know anyone in the discord probably already knows this, I'm mainly doing this for anyone looking to try their hand at this game and browsing the forums.
First step, get to Pale Lady: Simple enough, play the game until you get to her.
Second step, Finishing this quick: Walk towards the Pale Lady and she'll teleport away until she goes towards the top part of the screen.
Third Step, Skip the dumbest part of the fight: Normally you have to wait and survive a bunch of attacks but the game gives you a tool to actually hit her at the top part of the screen, skipping an entire attack, this even becomes easier to do this Skip for the final top screen phase.
This tool is the right side wall, by this point (if you haven't skipped the mandatory items) you should be able to wall jump, double jump, wall jump again, gliding back to the wall quickly again and again in order to gain just enough height to jump on her head. The game counts this as a hit, spawns the left platform for the next attack but skips it. Kill the two enemies from the attack after the one you skipped and do this (but easier due to the newly spawned platform)to put her in Final hit and end the fight.
If there is any way to do something like this to the Numenas fight, let me know.
(Note: Will update this with a screenshot when I actually find a way to do it consistently)