NPCs composing that spawngroup :

plaguebone_skeleton (16%)

NPCs spawning around that spawngroup :
(Max range : 200)

citymist_102, range=132 (-116,-566,75)

citymist_103, range=96 (-138,-636,76)

citymist_105, range=152 (-241,-474,75)

citymist_137, range=188 (-225,-438,5)

citymist_142, range=69 (-231,-557,3)

Captain_of_the_Guard (10%)
greater_spurbone (90%)

citymist_143, range=80 (-154,-620,5)

an_apparition (50%)
greater_spurbone (50%)

citymist_144, range=118 (-141,-553,3)

citymist_145, range=33 (-236,-593,3)

Captain_of_the_Guard (10%)
greater_spurbone (90%)

citymist_146, range=101 (-138,-594,3)

an_apparition (100%)

citymist_147, range=133 (-162,-513,5)

citymist_148, range=113 (-235,-513,5)

a_shadow (25%)
greater_spurbone (25%)

citymist_149, range=5 (-230,-623,23)

citymist_151, range=130 (-231,-496,3)

citymist_152, range=195 (-100,-483,4)

citymist_162, range=140 (-100,-584,22)

citymist_163, range=135 (-100,-645,23)

citymist_spectral_courier0_takp_import_v0, range=135 (-161,-512,5)

citymist_223157_takp_import_v0, range=110 (-260,-519,75)

gyrating_goo (100%)
gyrating_goo (100%)

citymist_222970_takp_import_v0, range=104 (-131,-645,76)

citymist_222977_takp_import_v0, range=151 (-245,-475,75)

citymist_223158_takp_import_v0, range=107 (-261,-522,75)

gyrating_goo (50%)
gyrating_goo (50%)

citymist_222963_takp_import_v0, range=127 (-152,-528,3)

citymist_222961_takp_import_v0, range=1 (-233,-625,3)

citymist_greater_spurbone86_takp_import_v0, range=95 (-219,-532,3)

greater_spurbone (50%)
greater_spurbone (50%)

citymist_222964_takp_import_v0, range=6 (-229,-622,21)

citymist_222962_takp_import_v0, range=81 (-153,-619,5)

citymist_222960_takp_import_v0, range=114 (-234,-512,5)

citymist_222958_takp_import_v0, range=151 (-95,-566,23)

citymist_222955_takp_import_v0, range=136 (-99,-644,23)