Dude that mace hit wouldn't have had any affect on WB Hulk. None. There are different levels of power. Bi-Beast has enough punching power to knock a guy that weighs as much as Superman out of the sky, or into orbit as well. I know what Nth metal is, I also know what Adamantium is as well, and its cutting ability hits extremely hard as well. Wolverine noted that the Hulk had become more difficult to cut, and that was when he was holding back during the WW Hulk arc. You can't even compare the levels that he was at during the WW Hulk arc to the levels that he was at during the HOTM arc. His durability increased with his strength. His resistances increased as well, or that magical sword that Betty hit him with would have cut him in two. She was borrowing from his ever increasing might which allowed her to keep pace with him indefinitely. In essence he was being hit by himself. Trust me, it would have no effect on him.
The sword was magical, and yes he was vulnerable to it, but it took the strength of Betty to even cut him with it. That was piercing damage. The mace was blunt force damage. The difference in strength between Hawkman and Betty was incalculable. If she held the mace then it would have done much more damage, but not in Hawkman's hands. Despero was nowhere near WB Hulk's physical level. Look at what Aquaman did to him? He would have bounced off of WB Hulk, but we see Despero careening through a cruise ship or whatever that sea vessel was. The punch to his gut by Lobo, would have gone unnoticed as well.