

mangohud %command%
FSR and DLSS options appear in the game, but it's unclear whether they're actually working. There’s no noticeable performance boost since the FPS is already above 60 without FSR/DLSS. However, the HDR feature is greyed out and cannot be enabled, even when using GE-Proton 9-27. So far, the game hasn’t crashed when using either the default Steam Proton or GE-Proton 9-27.

mangohud %command%
I was getting crashes pretty consistantly at the first picture scene but after swapping around between proton versions and turning off and on mangohud it just stopped happening altogether and now I can no longer reproduce it on any version of proton with our without mangohud.
I did run into some issues but I was later no longer able to reproduce them, so the exact cause/fix is unknown. I was having craches on proton-cachyos and GE-Proton9-26, I then switched to proton 9.0.4 and turned off mangohud and the crashes stopped. However after that I switched back to proton-cachyos and GE-Proton9-26 and was no longer getting the crashes there even with mangohud turned back on, so whatever the issue was, it seemed to go away.