Reasonable

The area was infested with zombies and controlled by necromancers. Whether following the druids or the original plan by Fernando, caution was still the most important thing. Anfey was very careful as he followed the druids, who were even more cautious than he was.

The mercenaries lagged behind because they had a big group and it was harder for them to sneak around the zombies the way the druids and Anfey could. Unless they encountered a large group of zombies, the mercenaries would try to kill every zombie they encountered. However, they couldn’t disturb the druids, either. By the time they finish killing the zombies, the druids would be too far away.

Thankfully, they had Long and Ling, who were very skilled with tracking. Without the two, the mercenaries would have startled the druids or encountered large groups of zombies.