NPCs composing that spawngroup :

a_greater_skeleton (33%)

a_lesser_mummy (33%)

a_necro_apprentice (34%)

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

befallen_57, range=179 (-750,32,-66)

befallen_55, range=184 (-732,-65,-66)

befallen_54, range=118 (-652,113,-66)

a_greater_skeleton (50%)
a_necro_acolyte (50%)

befallen_53, range=147 (-676,130,-68)

befallen_52, range=107 (-678,35,-67)

befallen_49, range=124 (-592,-97,-69)

befallen_48, range=125 (-620,-90,-67)

befallen_47, range=120 (-512,-79,-66)

befallen_46, range=150 (-480,-94,-67)

befallen_42, range=189 (-395,95,-11)

befallen_41, range=190 (-392,92,-67)

a_ghoul (50%)
ice_boned_skeleton (50%)

befallen_9, range=148 (-705,-38,-67)

befallen_8, range=168 (-645,-125,-67)

befallen_65, range=186 (-706,-102,-67)

befallen_74, range=188 (-533,-159,-39)

a_burnt_zombie (50%)
a_lesser_mummy (50%)

befallen_76, range=89 (-647,-21,-66)

befallen_77, range=81 (-627,-33,-67)

befallen_85, range=98 (-483,71,-78)

a_greater_skeleton (50%)
ice_boned_skeleton (50%)

befallen_88, range=185 (-400,98,-39)

befallen_89, range=127 (-456,80,-39)

befallen_90, range=155 (-437,104,-39)

befallen_91, range=199 (-372,29,-39)

befallen_92, range=199 (-372,7,-39)

befallen_93, range=128 (-456,-31,-38)

a_greater_skeleton (50%)
a_sturdy_skeleton (50%)

befallen_96, range=172 (-437,-82,-40)

a_necro_neophyte (50%)
a_zombie (50%)

befallen_98, range=87 (-586,-60,-39)

befallen_100, range=155 (-488,-105,-38)

a_large_plague_rat (50%)
a_necro_neophyte (50%)

befallen_104, range=195 (-623,-162,-66)

befallen_105, range=82 (-552,-54,-39)

a_dread_bone (50%)
a_shadowknight (50%)

befallen_106, range=104 (-486,86,-77)

befallen_109, range=133 (-438,37,-75)

ice_boned_skeleton (50%)
ice_boned_skeleton (50%)

befallen_110, range=103 (-494,95,-76)

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

befallen_112, range=172 (-401,-2,-67)

befallen_113, range=106 (-465,20,-39)

befallen_114, range=183 (-400,-41,-38)

befallen_115, range=123 (-449,47,-38)

befallen_116, range=66 (-540,85,-39)

befallen_117, range=65 (-591,88,-39)

befallen_118, range=135 (-568,161,-39)

befallen_119, range=166 (-546,191,-38)

befallen_120, range=116 (-519,130,-39)

befallen_121, range=139 (-511,152,-39)

befallen_124, range=17 (-556,18,-38)