Shes really not worth it if you already have Marr... She gets the passive for other FS users... but how often do you ever wish you could place more than 1? Usually i'm using a FS user for their class ability anyways, otherwise I prefer to drop healers (with a few exceptions). I can't think of a single time I've ever wished to have 2 FS users deployed. Shes only worth it if you have no other FS users at all (including the gold one). Get one for completions sake and save your SC for something you really want.