I ended up separating both fish last night after just 4 hours. I have never
seen a female tear up a male so badly before. It's not little nip marks, either, we're talking like whole strips of fin gone. Annoyingly, I spent a good 3 weeks conditioning this pair since they're both virgin fish. The male was still flaring and dancing, but looking exhausted, so I decided to put them back in their own tanks, lest I find him dead the next morning. The female's not even that big, and for as badly as she shredded him, she has no battle wounds whatsoever
Looks like I'll need a bigger, more aggressive male than this guy.