Adam's fight was the best, by far. Didn't think I'd like him because he's not known as a legendary warrior, but the "made in the image of God" and father of humanity concepts actually worked wonderfully.
Heracles is bland as hell, not to mention having a backstory that's almost entirely fabricated without any relation to his actual legend. As a character he only shined in the end with his compassion. It would've been a lot better if he'd been more fleshed out with more inner conflict about fighting against humanity.
On the flip side, Jack the Ripper's character is actually interesting. He's evil and insane, but still a human, even if he's a broken one. I have mixed feelings about their fight, it could've been much better (mostly on the Heracles side).
Overall, it's decent and has some very epic moments. The theme of humanity as the underdog is done quite poorly though, as the gods are barely stronger than the human heroes. They fight mostly like a manga martial artist and when they pull some bullshit the humans counter by pulling bullshits of their own.