Recently,I was thinking it's only osu!mania mode that doesn't have for score multiplier. Maybe if I suggest this,it will be acceptable since I want to see some player get more than 1,000,000 points for the beatmaps they have played.
Normally with no mod (based on the perfect 300 'rainbow' thing),
X 1.00 = 1,000,000
If you add multiplier for the mods (based on the perfect 300 'rainbow' thing),
X 1.06 = 1,060,000
X 1.12 = 1,120,000
X 1.25 = 1,250,000
X 1.26 = 1,260,000
X 1.41 = 1,410,000
It will be challenging
Normally with no mod (based on the perfect 300 'rainbow' thing),
X 1.00 = 1,000,000
If you add multiplier for the mods (based on the perfect 300 'rainbow' thing),
X 1.06 = 1,060,000
X 1.12 = 1,120,000
X 1.25 = 1,250,000
X 1.26 = 1,260,000
X 1.41 = 1,410,000
It will be challenging