NPCs composing that spawngroup :

a_shadow (16%)

Captain_of_the_Guard (16%)

plaguebone_skeleton (16%)

plaguebone_skeleton (16%)

plaguebone_skeleton (16%)

spurbone_skeleton (20%)

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

citymist_100, range=96 (-6,-564,76)

citymist_102, range=24 (-116,-566,75)

citymist_103, range=64 (-138,-636,76)

citymist_143, range=64 (-154,-620,5)

an_apparition (50%)
greater_spurbone (50%)

citymist_144, range=51 (-141,-553,3)

citymist_146, range=39 (-138,-594,3)

an_apparition (100%)

citymist_147, range=94 (-162,-513,5)

citymist_163, range=61 (-100,-645,23)

citymist_spectral_courier0_takp_import_v0, range=94 (-161,-512,5)

citymist_223157_takp_import_v0, range=78 (-130,-657,75)

gyrating_goo (100%)

citymist_222970_takp_import_v0, range=68 (-131,-645,76)

citymist_222977_takp_import_v0, range=58 (-117,-640,77)

citymist_222963_takp_import_v0, range=76 (-152,-528,3)

citymist_222962_takp_import_v0, range=63 (-153,-619,5)

citymist_222958_takp_import_v0, range=18 (-95,-566,23)

citymist_222955_takp_import_v0, range=60 (-99,-644,23)

citymist_Captain_of_the_Guard000_10021963, range=71 (-154,-631,21)

Captain_of_the_Guard (100%)