NPCs composing that spawngroup :

a_greater_skeleton (33%)

a_greater_skeleton (34%)

a_necro_acolyte (33%)

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

befallen_49, range=82 (-592,-97,-69)

befallen_46, range=35 (-480,-94,-67)

befallen_72, range=89 (-491,-166,-39)

a_dread_bone (50%)
a_dread_bone (50%)

befallen_74, range=82 (-533,-159,-39)

a_burnt_zombie (50%)
a_lesser_mummy (50%)

befallen_93, range=73 (-456,-31,-38)

a_greater_skeleton (50%)
a_sturdy_skeleton (50%)

befallen_96, range=75 (-437,-82,-40)

a_necro_neophyte (50%)
a_zombie (50%)

befallen_98, range=76 (-586,-60,-39)

befallen_100, range=35 (-488,-105,-38)

a_large_plague_rat (50%)
a_necro_neophyte (50%)

befallen_105, range=47 (-552,-54,-39)

a_dread_bone (50%)
a_shadowknight (50%)

befallen_111, range=95 (-470,7,-72)