The Giants approached carefully, waiting for Karl to make a move. They knew that they couldn't afford to be reckless against his speed, but this strange human also appeared to heal unnaturally quickly, despite being separated from his healers.
Karl was using [Rend] with [Nullify] to get past the defensive abilities of the Giants and force them to parry the skills, which kept them at a distance.
The fight speed had slowed to a crawl, and the whole battle was falling into a lull as the humans' stamina ran low.
Thor's efforts would have them recovered in no more than five minutes, but that was a long time in combat.
The Giants backed off a little, and a horde of Ogres advanced. They were only Royal Rank, the leaders of their species. But fighting them would burn more energy, and the Giants didn't care about expending them as cannon fodder.