I have just a hair under 200 dives in my jets (with spring straps). I love them, great manuverability, great with kicks other than flutter, great power when you need it, great finess for the close in work.
Really, the only way to know what will work for her is to borrow/rent some different fins and try them out.
Really, the only way to know what will work for her is to borrow/rent some different fins and try them out.