Thank you kabuso for the link. I was able to cross-reference what was on the predictions tab to be sure what race day is currently accepting bets.

so basically just skip the 5th day on week 2?

Learning to interpret the predictions would work.

i just grind until i can toss 100 on each...

of course, i'm the type to say screw flower gems for gacha pulling cause i'm flooded with 5*'s from events.... (and now has 9 6* girls too)