The coolnes in this fight its it only takes one shot from each to make a winner show up.
"I'm not sure how strong herc is at diminished power"
Its Blurry. Before Onslaught when he was depowered by Zeus he lost half of all his powers. It was stated. Then Onslaught happened and he wasent on earth. He came back asking Hulk to join him on a quest to find the missing avengers. They fought and for the first time Hercs punches didnt hurt or fazed Hulk. That Herc was still the " Half_powers_one "
It went on to his Heroes for Hire appearances, really low in strengh, to his 3 issue mini series where the same was stated and showed.
It was only in the recent Thor volume, Thunderbolts and Avengers that writters wrote him getting back to his classic costume and a strengh more to his immortal levels. This went until Jla/Avengers.
In final, he was extremely weak when he first appeared as mortal compared to what he was, but lately seems on par to his regular level.