NPCs composing that spawngroup :

a_water_mephit (100%)

NPCs spawning around that spawngroup :
(Max range : 100)

paw117754, range=95 (618,58,3)

paw117757, range=87 (731,-45,-37)

paw117761, range=80 (578,-80,-35)

paw117787, range=72 (607,28,3)

paw117790, range=76 (574,-3,-60)

a_fire_elemental_raider (100%)

paw_117969, range=93 (588,-109,-37)

paw_117970, range=45 (604,-12,-61)