This is a special challenge in which I use the unused Warp staff to try to get the lowest turncounts in each map. Since there's no way to know exactly where the staff would've been gotten had it actually been used (probably the desert), I decided to have Rhys come with it in Chapter 2, to use it for the entire game. Since it's an A rank staff and Rhys only has D at the start, it can't be used in that chapter (and Rhys isn't available for Chapter 3) making Chapter 4 the first chapter that can be warpskipped. The Warp staff doesn't really help that much here, as it's possible to 1-turn this map without it by having Shinon kill the boss.