I paused after ronin fight to turn off volume to avoid copyright. Then pause during dead time in RM bullet phase to turn it up so I can hear the music to properly dodge piano.(Wanna clarify that I did not use it to dodge as I was in corner when RM used the sweep attack that doesn't hit corner at all)

It's possible to beat the WR. But I quit for now. Check the video des if you wanna try for yourself.