The skeletons did not have a way to defend against her rapid-fire that was like a raging wave.
Hobusei-san burned and scattered the skeletons around using her fire magic. Of course, she did not choose to use her wide-area destructive magic because there were allies at the vicinity. But due to her ranking up, her magic effectiveness had increased; her encounter with the skeletons wasn’t much of a handicap.
As for me, it goes without saying.