Board Thread:Episode Discussion/@comment-4141313-20181124081953/@comment-4010415-20181128051643

She needed glyphs just to direct fireballs at the Lancers.

It has always appeared that Weiss needs to either use a glyph or swing or point Myrtenaster in order to use Dust, which would make her a less skilled Dust user than the likes of Cinder and Dew.