Jothany said:Your description reminded me of something a Dev said in a stream long ago, maybe the first Amberfaet stream. He told us of a mob design that they intended to have, of small groups of mobs that are low level and low HP, thus easy to kill. But they would attack in groups, and have unexpectedly high damage. So when they came along, particularly as adds, you had to stop immediately from whoever you were fighting and deal with them, or you would quickly find everyone's health dropping precipitously.
From March 18, 2018 (source) Joppa called them Ambient NPC's.