Well I did have problems with Ritsuko on her last Ex on episode 1 though maybe it's because I started going for rank S skills after getting her to S3 and finished the 1st episode ex set when she was only 34. Yeah, heard it becomes more effective if used in a trio. How about the Audition and Live? Did ya have any problem with her on those stages Naryoril.
Well, i had a smooth run on all 3 exs of Haruka's 2nd episode and had problem with only the last one so I guess those with after burst effect have an easier time going through their exs except festivals where a rival can disable the effect. If Azusa is hard, Iori will be harder as I had problem with her during her 1st episode's Live until I found out that i could press r1 as soon as it appears to get more chance to increase her voltage until I can burst before time ran out. I Believe those 2 will be the most problematic due to their luck based burst. Thankfully I'm done with both when they were only level 34s.
By the way, from the speed, I believe Haruka's 3rd episode will be easy as her solo dlc has the same speed as the songs I'm used too like Masterpiece and Dream.