Davis didn't lead the Soaring Emperor Sword to the disciples running around to make it use less amount of energy since it would fear harming them. Instead, he waited for it to use up its core energy.
Moreover, he had already used his Emperor Sigil before and hence couldn't use it again. Otherwise, he could easily repel the Soaring Emperor Sword.
All things said, he was completely at ease, defending against the Soaring Emperor Sword that was continually wasting its core energy. His Heaven Cleaving Abyss's initial form held immense energy that could be unleashed to a vast distance. Now that he was using it like a sword, it was likely able to hold its form for five more minutes, which he felt was ample for the Soaring Emperor Sword to exhaust its energy.
And as expected, it was not even five minutes before the Soaring Emperor Sword stopped, but it didn't leave, hovering in front of him.
