NPCs composing that spawngroup :

Captain_of_the_Guard (100%)

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

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

citymist_103, range=16 (-138,-636,76)

citymist_143, range=11 (-154,-620,5)

an_apparition (50%)
greater_spurbone (50%)

citymist_144, range=79 (-141,-553,3)

citymist_145, range=90 (-236,-593,3)

Captain_of_the_Guard (10%)
greater_spurbone (90%)

citymist_146, range=40 (-138,-594,3)

an_apparition (100%)

citymist_149, range=76 (-230,-623,23)

citymist_150, range=80 (-234,-626,5)

a_shadow (16%)
plaguebone_skeleton (16%)

citymist_162, range=71 (-100,-584,22)

citymist_163, range=55 (-100,-645,23)

citymist_223157_takp_import_v0, range=35 (-130,-657,75)

gyrating_goo (100%)

citymist_222970_takp_import_v0, range=26 (-131,-645,76)

citymist_222977_takp_import_v0, range=38 (-117,-640,77)

citymist_222961_takp_import_v0, range=79 (-233,-625,3)

citymist_222964_takp_import_v0, range=75 (-229,-622,21)

citymist_222962_takp_import_v0, range=12 (-153,-619,5)

citymist_222958_takp_import_v0, range=87 (-95,-566,23)

citymist_222955_takp_import_v0, range=56 (-99,-644,23)