NPCs composing that spawngroup :

an_undead_oblation (100%)

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

charasis_30, range=82 (-1,-111,21)

charasis_77, range=32 (-45,-13,5)

charasis_78, range=30 (-45,-43,6)

charasis_111, range=79 (-96,-42,-189)

charasis_201, range=39 (-45,0,6)