While entertaining to see what she comes up with, Yoshino is not good at fighting. She's been pretty lucky so far, but these plans are highly dependent on luck and rather risky to her because she doesn't (so far as we know) have any martial ability to get out if something goes wrong. On the one hand she's sort of badass when she goes all serious and makes pronouncements, but her actions don't seem to live up to that. I'm hoping there's a larger strategy she's got here, given how she seemed to know so much about Kirishima's plans and that she made a comment previously about *something* being her specialty.