To be honest I really don't like this Coliseum. Instead of competing for skills, it's more about luck. If you draw Mallory and they don't, you win. If you keep playing against opponents who are stupid enough to use Pulsar and Akiko, you go to the top 30. No skill required.
I'm against Mallory Tuco Niki Frank with Frank Niki Adele Jeff. There's no way I can win this battle. Niki 3 pills is instant loss already