I was not far to level-up with a lot of Stamina left, but it was time to go to bed, so I replayed that ?-4 map twice (100 Sta). Guess what? I totally cleared it (3 Medals) each times.
It's a good map to get Gold (7k+) and Gatcha (700+) when you don't want to level-up asap.

well 7K gold and 700s seeds do sounds good but really if you already do 12-3 that one is way better than that with differences of +14?stam
if you do not want to lvl up that's different ofc

Finally 3*'d all the chapters. Took quite a lot of tries for me, I had some really bad rng luck. I had the most trouble with the 3rd stage

The only one time i succeed to get the boss in middle, my team never ends to turn in the middle, and bees just kill me. So great!