Similar to challenge stage 3 of this event, there isn’t really a lot to take note of. But unlike stage 3, which is easily dealt with by bringing a strong Single-Target damage dealer to end the stage early, an AoE damage dealer will be an ideal pick to clear out the waves quickly.
The first thing you’ll notice when entering this stage is there are 2 Elite enemies, they are immune to damage and buff other enemies. Since these enemies are not required to complete the stage, we recommend not targeting them, as they can take up a lot of time. Thankfully, after clearing out the trash mobs of each wave, they will retreat, allowing you to reach the boss.
Elite Enemies buffing the other enemies
The buff they apply to the rest of the enemies makes them hard to defeat. While this can take up a lot of time if not dealt with, it is easily countered by using a Crowd Control (CC) skill on them, such as Tsubaki’s EX Skill.
For this stage, you will mostly want to bring AoE damage dealers on your team to clear out the waves. Students such as Nonomi and Momoi do very well here, while Cherino is a strong option as well, her Basic Skill may apply Focused Assault on an Elite enemy, slowing down the pace of the fight. After securing your AoE damage dealers, you can then go for Crowd Control students to cancel the buffs applied on the enemies, Tsubaki is a great option for this as she can fulfill multiple roles in a team. The rest of the slots can then be filled out with healers, tanks, or generic supports as you see fit.
Note that characters listed here are only some of the viable options