If you're going to buy DLC I advise the Dream and Music Songs if you could do it separately as those songs are easy for beginners and as I will show in my later video are easy to perfect chain. Also since you will need to win B3 All-Star Live to get a None DLC Quinted song Masterpiece as using 3 Trio Songs in ASL will exclude 4 of the 13 idols from Max Memory Increase (not tested). Also one of the Music Costume sets will be the ones I'll use starting the 2nd year in this run. We also get the 3rd Idol in this video and one of the 3 only times I will record the lesson as I'm not really into the Lesson Mini games especially the Dance one even in the lowest difficulty which is why I probably won't do an IM2 run as Lessons there are Essential.

As I said before, here is the Floor 20 Crystal location and I finally take on most of the Advance bosses starting from now. Note for the Volcano boss. Hit him in the back for higher stun locking chances