If you're close enough to be in slide range you can mash it and it'll catch her during her pressure, although that's blockstring dependent. You pretty much win once you have vorpal, Hildas will have to respect it since you can cs -> ex reaper during any of her pressure strings, and that will lead to a knockdown and you win from there. Try baiting veil off once they have 100 meter. And you can throw out raw ex reaper if you see them not respecting it, i.e. you're letting them pressure you for free. Honestly it's not that hard of a match-up, you can just block forever, her mix-ups aren't hard to block, unless you're playing online. Just remember to keep cs, and 100 meter, that makes Hildas stop pressing buttons.