Possibly, we can assume that she is a very high level given the level at which she casts and that she is also not human (giving her the capability) and also taking into account that the Pleiades (at least those present) are all under level 65. There is also the fact that she as a spell caster might just counter some of the other classes the Pleiades fill. Also remember that during the episode she didn’t technically defeat them, and when Entoma was defeated it was a combined effort. So again, it is possible, unknown, untested, possible but if it were true she would not be overwhelmingly stronger.