NPCs composing that spawngroup :

a_lesser_mummy (33%)

a_necro_acolyte (34%)

a_sturdy_skeleton (33%)

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

befallen_54, range=96 (-652,113,-66)

a_greater_skeleton (50%)
a_necro_acolyte (50%)

befallen_53, range=112 (-676,130,-68)

befallen_52, range=167 (-678,35,-67)

befallen_42, range=185 (-395,95,-11)

befallen_41, range=189 (-392,92,-67)

a_ghoul (50%)
ice_boned_skeleton (50%)

befallen_76, range=198 (-647,-21,-66)

befallen_85, range=123 (-483,71,-78)

a_greater_skeleton (50%)
ice_boned_skeleton (50%)

befallen_88, range=179 (-400,98,-39)

befallen_89, range=138 (-456,80,-39)

befallen_90, range=142 (-437,104,-39)

befallen_106, range=111 (-486,86,-77)

befallen_109, range=179 (-438,37,-75)

ice_boned_skeleton (50%)
ice_boned_skeleton (50%)

befallen_110, range=99 (-494,95,-76)

befallen_111, range=182 (-470,7,-72)

befallen_113, range=174 (-465,20,-39)

befallen_115, range=164 (-449,47,-38)

befallen_116, range=80 (-540,85,-39)

befallen_117, range=76 (-591,88,-39)

befallen_119, range=37 (-546,191,-38)

befallen_120, range=57 (-519,130,-39)

befallen_121, range=57 (-511,152,-39)

befallen_123, range=135 (-571,26,-39)

befallen_124, range=143 (-556,18,-38)