Archbishop Pavius tried his best to assist Thalior, Xena, and the knights while at the same time keeping Novia safe. He could bless them with divine power, giving them the strength and power to fight against the Corrupted.
Xena and Thalior, both Swordmasters, used everything they had to get rid of the Corrupted. They stood their ground and fought the endless enemy that kept coming.
The battle was almost one-sided. It wasn't that they couldn't kill the Corrupted, it was because they kept coming back to life. Not only that, most of the knights had fallen and became their enemy as well because they were turned into Corrupted.
Xena and Thalior used everything they got and cut dozens of Corrupted into pieces in a single combo attack. They were the only ones who could prevent the Corrupted from resurrecting, and it didn't change the situation in the slightest.