NPCs composing that spawngroup :

a_greater_skeleton (33%)

a_lesser_mummy (33%)

a_sturdy_skeleton (34%)

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

befallen_56, range=94 (-365,104,-10)

skeleton_Lrodd (50%)
skeleton_Lrodd (50%)

befallen_45, range=97 (-359,91,-68)

a_ghoul (50%)
a_necro_acolyte (50%)

befallen_42, range=62 (-395,95,-11)

befallen_41, range=65 (-392,92,-67)

a_ghoul (50%)
ice_boned_skeleton (50%)

befallen_60, range=83 (-373,69,-10)

befallen_85, range=28 (-483,71,-78)

a_greater_skeleton (50%)
ice_boned_skeleton (50%)

befallen_88, range=58 (-400,98,-39)

befallen_90, range=30 (-437,104,-39)

befallen_91, range=98 (-372,29,-39)

befallen_106, range=30 (-486,86,-77)

befallen_109, range=46 (-438,37,-75)

ice_boned_skeleton (50%)
ice_boned_skeleton (50%)

befallen_110, range=40 (-494,95,-76)

befallen_111, range=74 (-470,7,-72)

befallen_112, range=98 (-401,-2,-67)

befallen_113, range=60 (-465,20,-39)

befallen_115, range=33 (-449,47,-38)

befallen_116, range=84 (-540,85,-39)

befallen_120, range=80 (-519,130,-39)

befallen_121, range=90 (-511,152,-39)