Battles - The MAX- How to beat it?

[Sub-0110]

I'm not being able to get past 2 or 3 characters in this battle. Some times losing on the first level. Can someone guide me in dealing with this.

 

[ICE_C0LD_ZERO]

Trying to figure this out too. Almost beat it legitimately a few days ago but a broken Batgirl in the 6th battle kicked my ass. Heard you can beat it by spamming Doomsday