This is similar to Arcaea (Vicious Labyrinth) because: 1. It has the similar error part (Axium Crisis) 2. The Anomaly artist intro thing (Grievous Lady) 3. The hardest chart I think (Also Grievous Lady)
depending on your playstyle, Fracture can be the most hardest, as well as Saikyou.... I personally rank them by difficulty of Saikyou > FR > GL given I have the sufficient speed to perform GL