apparently the final boss is getting rebalanced because alot of people are complaining about it. Add me to the pile. I haven't the slightest idea how to legitimately fight her. I win by brute force alone. Super upgrade, max damage, max resistance to pain/pleasure tends to work, but also abit of luck. Crouching kicks seem best, but even those tend to fail because the moment she sprints you're fucked. Literally. Even if you can react on time, she runs faster than you. which means...don't stop never stopping! the kicking i mean. Still beat the game, but needing to complete an entire zone just to try again is a bother. Unless there's a shortcut to heaven im not seeing somewhere.
edit: actually, being real with ya....I brute forced all the bosses. get enough upgrades, you can cheese em all. tank the damage, never stop mashing. just michella was the only one where cheesing only works half the time instead of all the time. for the future, might wanna change how you handle bosses. Maybe add hitstun for clear attack opportunities, punish mashing and brute force.