NPCs composing that spawngroup :

a_dread_bone (34%)

a_greater_skeleton (33%)

a_sturdy_skeleton (33%)

NPCs spawning around that spawngroup :
(Max range : 200)

befallen_57, range=168 (-750,32,-66)

befallen_54, range=65 (-652,113,-66)

a_greater_skeleton (50%)
a_necro_acolyte (50%)

befallen_53, range=94 (-676,130,-68)

befallen_52, range=101 (-678,35,-67)

befallen_49, range=185 (-592,-97,-69)

befallen_48, range=180 (-620,-90,-67)

befallen_47, range=184 (-512,-79,-66)

befallen_42, range=196 (-395,95,-11)

befallen_41, range=199 (-392,92,-67)

a_ghoul (50%)
ice_boned_skeleton (50%)

befallen_9, range=169 (-705,-38,-67)

befallen_76, range=122 (-647,-21,-66)

befallen_77, range=126 (-627,-33,-67)

befallen_85, range=109 (-483,71,-78)

a_greater_skeleton (50%)
ice_boned_skeleton (50%)

befallen_88, range=191 (-400,98,-39)

befallen_89, range=135 (-456,80,-39)

befallen_90, range=154 (-437,104,-39)

befallen_93, range=179 (-456,-31,-38)

a_greater_skeleton (50%)
a_sturdy_skeleton (50%)

befallen_98, range=148 (-586,-60,-39)

befallen_105, range=147 (-552,-54,-39)

a_dread_bone (50%)
a_shadowknight (50%)

befallen_106, range=105 (-486,86,-77)

befallen_109, range=161 (-438,37,-75)

ice_boned_skeleton (50%)
ice_boned_skeleton (50%)

befallen_110, range=97 (-494,95,-76)

befallen_111, range=145 (-470,7,-72)

befallen_113, range=143 (-465,20,-39)

befallen_115, range=147 (-449,47,-38)

befallen_116, range=51 (-540,85,-39)

befallen_118, range=76 (-568,161,-39)

befallen_119, range=112 (-546,191,-38)

befallen_120, range=83 (-519,130,-39)

befallen_121, range=102 (-511,152,-39)

befallen_123, range=65 (-571,26,-39)

befallen_124, range=78 (-556,18,-38)