NPCs composing that spawngroup :

an_undertaker_skeleton (33%)

a_helot_skeleton (33%)

elementalbone_skeleton (34%)

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

charasis_7, range=76 (117,-458,40)

an_undertaker_skeleton (50%)
a_hamal_skeleton (50%)

charasis_8, range=93 (152,-440,25)

charasis_14, range=98 (101,-440,22)

charasis_88, range=68 (135,-600,22)

charasis_89, range=16 (152,-533,22)

charasis_91, range=69 (152,-600,22)

charasis_192, range=98 (65,-600,22)

charasis_193, range=88 (80,-600,22)

charasis_194, range=56 (80,-532,22)

charasis_195, range=73 (63,-533,22)