NPCs composing that spawngroup :

a_Nihil_arcanist`s_spirit (100%)

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

snpool60921, range=90 (325,-848,-59)

snpool60922, range=38 (427,-812,-57)

snpool60926, range=51 (463,-830,-62)

snpool60927, range=60 (474,-836,-60)