This Seeking Tech guide will show you how to get the Jeanne d’Arc trophy called Struggle on High. In order to unlock this, you need to complete the Raillemont level. This free stage will be available when you complete the Tower of Alsace.
For this rooftop location, make sure you bring archers in addition to magic attacks.
If you recruited Rose in your party, then you can use her to quickly get to the Queen Rouge. The Sky Dart attacks from your archers can also quickly end the stage.
If you don’t have Rose or Sky Darts, then you can still end the stage quickly by having Colet move close to the Queen Rouge. Once you get close enough, attack her with magic until she falls.