NPCs composing that spawngroup :

a_greater_skeleton (33%)

a_necro_apprentice (34%)

a_sturdy_skeleton (33%)

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

befallen_56, range=72 (-365,104,-10)

skeleton_Lrodd (50%)
skeleton_Lrodd (50%)

befallen_47, range=197 (-512,-79,-66)

befallen_45, range=79 (-359,91,-68)

a_ghoul (50%)
a_necro_acolyte (50%)

befallen_44, range=163 (-275,80,-11)

a_necro_neophyte (50%)
a_putrid_skeleton (50%)

befallen_43, range=119 (-319,84,-10)

befallen_42, range=42 (-395,95,-11)

befallen_41, range=46 (-392,92,-67)

a_ghoul (50%)
ice_boned_skeleton (50%)

befallen_40, range=141 (-328,13,-12)

befallen_39, range=166 (-287,31,-11)

befallen_38, range=175 (-289,10,-11)

befallen_37, range=144 (-294,127,-10)

befallen_36, range=163 (-275,125,-10)

befallen_35, range=159 (-282,139,-11)

befallen_34, range=129 (-334,183,-11)

a_putrid_skeleton (50%)
a_shadowknight (50%)

befallen_33, range=121 (-332,166,-12)

befallen_7, range=180 (-298,-11,-11)

a_skeletal_excavator (50%)
a_skeletal_excavator (50%)

befallen_60, range=73 (-373,69,-10)

befallen_85, range=56 (-483,71,-78)

a_greater_skeleton (50%)
ice_boned_skeleton (50%)

befallen_88, range=37 (-400,98,-39)

befallen_89, range=30 (-456,80,-39)

befallen_91, range=99 (-372,29,-39)

befallen_92, range=116 (-372,7,-39)

befallen_93, range=136 (-456,-31,-38)

a_greater_skeleton (50%)
a_sturdy_skeleton (50%)

befallen_96, range=186 (-437,-82,-40)

a_necro_neophyte (50%)
a_zombie (50%)

befallen_105, range=195 (-552,-54,-39)

a_dread_bone (50%)
a_shadowknight (50%)

befallen_106, range=52 (-486,86,-77)

befallen_109, range=67 (-438,37,-75)

ice_boned_skeleton (50%)
ice_boned_skeleton (50%)

befallen_110, range=57 (-494,95,-76)

befallen_111, range=102 (-470,7,-72)

befallen_112, range=111 (-401,-2,-67)

befallen_113, range=88 (-465,20,-39)

befallen_114, range=149 (-400,-41,-38)

befallen_115, range=58 (-449,47,-38)

befallen_116, range=104 (-540,85,-39)

befallen_117, range=154 (-591,88,-39)

befallen_118, range=142 (-568,161,-39)

befallen_119, range=139 (-546,191,-38)

befallen_120, range=86 (-519,130,-39)

befallen_121, range=88 (-511,152,-39)

befallen_123, range=155 (-571,26,-39)

befallen_124, range=146 (-556,18,-38)