User blog:ILLMASTER/Zaren's Challange Quest

Since there are many guide on how Zaren's 1st challange(which can be cleared with brute force), I wonder if there any tips on doing the other challange. So, far I cannot go farther than 2nd wave with my best party I can think of( and I can afford) in each challenge. The enemies are strong, even stronger than 6 member Homura raid in the village of begining on this madoka event.