Do you know that if you send in just one person, and the mob being pulled doesn't detect the person's party members around him/her, they tend to not link or only produce 1 link?

While doing levequest in Nanawa, I got the same problem with the room full of Yarzons, and that Yarzon would also call for help from a Coblyn that's walking around. My solution was leaving the rest of the party in a safe distance, but not too far because mobs you pull will try to run back to their territory, and have one person pull.