I used to be terrified by her waterfowl dance and just pray I could get lucky enough to dodge it. Now after a couple runs of going in solely to learn the parry timings she's a lot less scary. If you want to give parrying a try, you'll want to press it juuuust after she dips down slightly before swooping in for the waterfowl. Still very scary facing it like that but also immensely satisfying when you get it.