NPCs composing that spawngroup :

a_Dervish_Cutthroat (20%)

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

sro_85, range=32 (99,-660,-23)

sro_56, range=96 (211,-645,-24)

sro_14, range=42 (80,-686,-23)

sro_109, range=82 (77,-614,-25)