The chaos escalated even managing to make Apollo rethink about using another skill though Jeremiah was against it. Something inside the island was hindering the system, clearly, it was a powerful artifact so it is best not to rely too much on the system until they figure out where the artifact is.
The remaining able students on the other hand cast a spell to create a shield that could momentarily protect their teachers. It wasn't that strong to last but it was enough to buy time.
While the fighting continued, Apollo aimed and fired the weapon in his hand. He could see how the professors were a team and each one of them could easily watch for the others' blind spots. Their synergy amazes him, they were experienced fighters with the confidence to leave their back protected by their comrades. The connection they have must have been built by years of fighting alongside each other.