While Maria found herself a Master to help her, Mira could only spar with others while trying to come to her own conclusions on how a scythe should be used. The scythe is such a unique weapon that most people never even think about using it. Finding someone using a scythe is already hard enough, let alone finding someone to help her learn more about it. But just because it's not popular doesn't mean it's a bad weapon. The scythe actually has one of the highest potential and utility compared to other weapons, the only problem is it's incredibly difficult to use and there are many different ways to use a scythe.