Zane must have watched videos on the ten fighting as a team, because at this point, even Regius had to admit that their teamwork was impeccable. They attacked him while keeping Dinah safe so that they could stop him from attacking her. It gave her the ability to continuously temper with time magic long enough to disrupt any defenses or attacks he was planning.
At this point, she had even rewound time on his arrows to stop him from attacking her from afar. Regius had been stuck on defense since this entire fight started his own work with time. Mana had always been shallow at best and was not capable of stopping the only person he had ever met attuned to it. The most unfortunate thing was that the laws of necromancy stopped him from taking from any of these people, or he would have focused on Dinah's comprehension on time mana.
