As soon as Paul revealed himself, for some reason, it looked like Jill was staying back and not engaging with him. She seemed willing at first, but once she realised her and her family's situation, she backed away.
This was another reason why Paul wanted to switch with Peter. In this type of situation, it actually benefited them more. The longer Jill took to act, it was just one less person they had to deal with. The gargoyle statues and the towers could continue doing their work, slowly dwindling their numbers.
Whereas Peter might have rushed in head first, but Paul didn't just stand around doing nothing. While Jill was waiting, Paul had the three long-bladed spiked gloves on him, but these weren't like the last ones he had. They were red in colour.
Going through the battlefield, Paul carefully picked and decided who he would strike, blocking a claw from a vampire from above, and scratching them with his glove. It didn't take long for the vampire to start to kneel over.