NPCs composing that spawngroup :

a_phantom (25%)

a_phantom (25%)

greater_spurbone (25%)

greater_spurbone (25%)

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

citymist_44, range=37 (256,34,4)

citymist_51, range=26 (250,-9,4)

plaguebone_skeleton (100%)

citymist_52, range=42 (194,-14,-9)

citymist_57, range=96 (219,-88,1)

citymist_66, range=87 (143,-6,274)

a_deranged_madman (50%)
greater_plaguebone (50%)

citymist_74, range=94 (150,-42,273)

citymist_91, range=93 (280,-71,75)

citymist_119, range=94 (140,-21,-9)

a_shadow (20%)
greater_spurbone (20%)

citymist_222990_takp_import_v0, range=91 (139,19,273)

a_mist_golem (50%)
greater_war_boned_skeleton (50%)

citymist_223158_takp_import_v0, range=49 (278,20,75)

gyrating_goo (50%)
gyrating_goo (50%)

citymist_222966_takp_import_v0, range=25 (250,-8,4)