NPCs composing that spawngroup :

a_burnt_zombie (34%)

a_greater_skeleton (33%)

a_lesser_mummy (33%)

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

befallen_70, range=90 (-363,-161,-39)

a_necro_initiate (50%)
a_zombie (50%)

befallen_71, range=65 (-384,-175,-39)

a_dread_bone (50%)
a_dread_bone (50%)

befallen_72, range=68 (-491,-166,-39)

a_dread_bone (50%)
a_dread_bone (50%)

befallen_73, range=64 (-500,-231,-39)

a_dread_bone (100%)

befallen_95, range=32 (-429,-242,-39)

befallen_97, range=99 (-416,-114,-39)

a_lesser_mummy (50%)
a_sturdy_skeleton (50%)

befallen_108, range=61 (-435,-150,-69)