NPCs composing that spawngroup :

#The_Undertaker_Lord (25%)

a_hamal_skeleton (25%)

a_hamal_skeleton (25%)

hexbone_skeleton (25%)

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

charasis_7, range=46 (117,-458,40)

an_undertaker_skeleton (50%)
a_hamal_skeleton (50%)

charasis_8, range=18 (152,-440,25)

charasis_10, range=18 (152,-404,24)

charasis_14, range=48 (101,-440,22)

charasis_15, range=48 (101,-404,23)