Chi Xue led a group of cultivators in the first attack, leaving many of the shield formations damaged. Then Ling Tian relied on his powerful attacks to punch straight through the enormous shields, opening a large hole. That allowed Po Tian and the others to fire through it and strike the enemies behind the shield formations.
Ling Tian and the others had to be credited for their excellent teamwork. That attack had not only knocked several people unconscious, but also wounded more than ten others to varying degrees. Those cultivators had to divert some of their attention to dispelling the invading Arrow Intent and various strange energies, greatly weakening their strength. As a result, the pressure on Ling Tian and the others eased considerably.
Most importantly, the attack had made the Demon Slayer Alliance cultivators realize the threat they faced, forcing them to slow down. That meant Ling Tian and the others could buy themselves more time.
The longer they delayed the enemy, the greater Ling Tian's influence over the Sealing Heaven Grand Formation set up by the Tu Family Brothers through Intent Power—and the more control he could wrest from them. The situation would gradually tilt in Ling Tian and the others' favor. At the very least, this gave Chi Xue and the others hope that they could defeat all the Demon Slayer Alliance cultivators, and they were immediately encouraged.
It made sense. Staying alive mattered more to Chi Xue and the others, but if they could defeat the Demon Slayer Alliance cultivators, that would be even better. Then they would have a chance to claim the spoils of war. Obtaining those two Saint-grade Heavenly Treasures would not only further accelerate Ling Tian and the others' growth; most importantly, they would be able to stay in the Sacred Ruins