I don't know which one I'd fit into.
I rank pretty high, 80+ (without meta group buffs), that's above average isn't it? (though you didn't define what "low" and "average" count in fflog culture, but I'm usually purple).
But I've only beaten o7s once, and never even tried O8S. It's not that I can't, it's just my static isn't full of super hardcore players so we raid 3 hours a day, 3 days a week and don't really sweat over. I never feel like I'm being carried because I've spent the time practicing, watching vids, learning rotations, and analyzing top players' logs and feel very confident that as far as technical skill goes, I've reached peak. If I ever bothered to join a parse or meta group, I'd definitely get orange, but I'd rather play with people I know I like even if we go slower.
So, as an individual, based on my personal performance I'd put myself as hardcore or low hardcore.
But because I choose to play with a mix of hardcore/midcore/casual people, which a lot of this content is party play, content-wise I clear more like a midcore person.
Since your classification is both content and fflogs based, I don't know how I'd place myself because of the discrepancy.
Personally if asked I place myself as midcore because I choose to play with other people whose skill level and logs are grey/green/blue.
What do you think?