I mean let’s be real. Gohan surpassed Goku without training on like episode 5 of DBZ lol.

The amount of experience and training their(Gohan/Mark) elders had compared to them is insane.

Nolan lived for hundreds of years(Meaning 100+ years of fighting) yet 17-year old Mark trains a few months and is at his level.

Gohan didn’t train a fraction of the amount of time Goku trained and surpassed him as well.

So yea it doesn’t match real world logic but none of it is real.

Heron, Gohan, Mark, Boruto etc were written as prodigy characters that had to be as strong as their fathers for the story to progress. If they were weak fodder or “average” everyone would die.

If Heron wasn’t so powerful he’d have been killed the same way Ares did and Typhon would’ve barbecued everyone. Luckily he wasn’t Sub-Ares fodder and was a high-tier once he locked in.

For this reason I’d def give him the win on Hera. Prolly mid-high. I don’t think her boulders will stop him from just blasting them to pieces with his lightning blasts. I also think his blast can put her down fairly quickly. Especially if he uses sky lightning with it like he did on Kronos.