NPCs composing that spawngroup :

gyrating_goo (25%)

gyrating_goo (25%)

gyrating_goo (25%)

gyrating_goo (25%)

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

citymist_1, range=43 (-117,-416,76)

#A_Terror_Wraith (10%)
greater_war_boned_skeleton (90%)

citymist_139, range=75 (-136,-385,4)

a_shadow (16%)
greater_spurbone (16%)

citymist_141, range=41 (-139,-422,5)

plaguebone_skeleton (25%)

citymist_144, range=96 (-141,-553,3)

citymist_147, range=68 (-162,-513,5)

citymist_152, range=31 (-100,-483,4)

citymist_156, range=93 (-188,-395,4)

a_shadow (25%)
greater_spurbone (25%)

citymist_165, range=88 (-54,-400,10)

a_haze_golem (50%)
a_lost_one (50%)

citymist_spectral_courier0_takp_import_v0, range=67 (-161,-512,5)

citymist_222977_takp_import_v0, range=7 (-115,-454,75)

citymist_223158_takp_import_v0, range=5 (-115,-460,75)

gyrating_goo (50%)
gyrating_goo (50%)

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

citymist_222958_takp_import_v0, range=82 (-77,-389,11)

citymist_222956_takp_import_v0, range=35 (-144,-433,5)

citymist_222955_takp_import_v0, range=42 (-138,-421,5)

citymist_plaguebone_skeleton93_takp_import_v0, range=80 (-42,-440,3)