NPCs composing that spawngroup :

a_necro_initiate (34%)

a_sturdy_skeleton (33%)

a_zombie (33%)

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

befallen_56, range=97 (-365,104,-10)

skeleton_Lrodd (50%)
skeleton_Lrodd (50%)

befallen_45, range=85 (-359,91,-68)

a_ghoul (50%)
a_necro_acolyte (50%)

befallen_43, range=93 (-319,84,-10)

befallen_42, range=90 (-395,95,-11)

befallen_41, range=87 (-392,92,-67)

a_ghoul (50%)
ice_boned_skeleton (50%)

befallen_40, range=44 (-328,13,-12)

befallen_39, range=88 (-287,31,-11)

befallen_38, range=83 (-289,10,-11)

befallen_7, range=76 (-298,-11,-11)

a_skeletal_excavator (50%)
a_skeletal_excavator (50%)

befallen_60, range=62 (-373,69,-10)

befallen_72, range=97 (-350,-88,-80)

a_dread_bone (50%)
a_dread_bone (50%)

befallen_88, range=95 (-400,98,-39)

befallen_91, range=22 (-372,29,-39)

befallen_93, range=92 (-456,-31,-38)

a_greater_skeleton (50%)
a_sturdy_skeleton (50%)

befallen_109, range=72 (-438,37,-75)

ice_boned_skeleton (50%)
ice_boned_skeleton (50%)

befallen_111, range=98 (-470,7,-72)

befallen_112, range=30 (-401,-2,-67)

befallen_113, range=93 (-465,20,-39)

befallen_114, range=55 (-400,-41,-38)

befallen_115, range=86 (-449,47,-38)