I’d let go of the idea of a match school. Find a couple of safeties she likes - apply to schools with EA and rolling admissions.
One suggestion is to look at some of the tech schools - they are often looking for women and many of them have good offerings in economics. For example RPI would be likely to offer merit money, has economics (including at the graduate level). Another possiblity would be Carnegie Mellon - it offers economics both through arts and sciences (DC 22% admissions rate) and the Tepper Business School (TPR 17% acceptance rate). https://admission.enrollment.cmu.edu/pages/undergraduate-admission-statistics I don’t know what swimming is like at either school.
I think the worry about yield protection is exaggerated.