Ultimate Skill Spam Formation

Prepare yellow for Imatsurugi-chan with Souza-san. Prepare red for Mikazuki-san with Imatsurugi-chan. Use that red to clear everything with Mikazuki-san's ultimate skill. This loop allows you to unleash ultimate skills about 6 times. Mikazuki-san is rare, but Souza-san and Imatsurugi-chan are low rarity, so I think they're easier to get! Maeda-kun is also easy to use. I also recommend spamming support ultimate skills with Maeda-kun, Yagen-san, and the rare Ran-kun~