With like 80 points per 35 stamina map and around 4 such runs to get bonus stage that gives like 500 (at least to me) and is actually hard enough to even pass with just 4* girls. You get like 800-850 points per 140 stamina, 16h a day of regeneration is 320 stamina 400 if we add what you got when sleeping (well I have 80 stamina limit ). So thats like around 3 such runs a day without leveling up/refilling stamina. So a F2P casual like me can reach like 2K4 to maybe 2K5 points a day. This event is a joke...
If spawned map gives around 500 per run, 160 Magas will give you wooping 80K points. So yeah you would need all those to teach from 400K to 500K. Question is how the fuck you would reach 400K in the first place thou...