The Performance of a Single-Copy Cheong-u

Helped clear the stages I was stuck on in Greed Floor 19. Then, for Stage 29 where I was struggling, I put in Cheong-u and cleared it with 3 DPS. It also helped a bit with Area Purification. I only have 1 copy of Iruya, and Cheong-u is a single-copy unit that I haven't even resonated, but she got 3 stars right after I pulled her. The standard setup is 2 DPS, 2 Healers, 1 Tank, but when your combat power is insufficient, you can also go with 3 DPS, 1 Tank, 1 Healer. I personally swap between 2 DPS, 2 Tanks, 1 Healer. If you're struggling, it's because your performance isn't enough, not because of the unit's capabilities.