Jack tried again to knock the one that came at him. He waited until it stuck on his body before he hit it. But his second attempt was a bit late. The Volatile Firefly Ant already exploded by the time his claw hit the bug.
He cast Time Domain. He then repeated the process. With his speed increased and his enemies slowed, he could repeat what he had achieved on several occasions. Yet, it was not perfect. Some were hit too slowly so they already exploded before they left his body. Some were hit too fast so they were knocked away but didn't explode. Those ones quickly scurried back to him.
It all came down to timing, and Jack was trying to catch that timing.
His Gold Scale Armor ended and his Lightning God Suit was about to. Before it did, Jack unleashed Lightning God Barrage right on top of himself. Since the Volatile Firefly Ants were crowding around him, they received the full brunt of the divine skill.