I imagine it would be more along the lines of:

- Phase 1: You fight against hanged Sayori as she throws waves of depression at you.
- Phase 2: You fight a faceless Natsuki that throws cupcakes and other desserts at you along with manga pages.
- Phase 3: You fight Yuri, who uses knives both against you and herself, with the blood acting as harmful proyectiles.
- Final Phase: Monika, obviously. With her only attack being sitting there, invincible, simply smiling at you. You still win by deleting her file.