?-3 took several tries to 3*, but ?-4 went REALLY odd. That map is really heavy on RNG, so after a few tries I just thought F-it, and made a final fun attempt with all squads in the top camp and.. 3-medalled it. O.O
(first team to hit the main boss was very weakened from the second-last boss, and got wiped, all other units hit teleport pads and went back to the beginning, splitting perfectly for a full clear on pests and first boss)