NPCs composing that spawngroup :

a_phantom (25%)

greater_plaguebone (25%)

greater_plaguebone (25%)

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

citymist_44, range=79 (256,34,4)

citymist_51, range=56 (250,-9,4)

plaguebone_skeleton (100%)

citymist_57, range=78 (219,-88,1)

citymist_66, range=51 (143,-6,274)

a_deranged_madman (50%)
greater_plaguebone (50%)

citymist_74, range=52 (150,-42,273)

citymist_119, range=54 (140,-21,-9)

a_shadow (20%)
greater_spurbone (20%)

citymist_222990_takp_import_v0, range=64 (139,19,273)

a_mist_golem (50%)
greater_war_boned_skeleton (50%)

citymist_223158_takp_import_v0, range=90 (278,20,75)

gyrating_goo (50%)
gyrating_goo (50%)

citymist_222975_takp_import_v0, range=42 (230,8,5)

citymist_222966_takp_import_v0, range=56 (250,-8,4)

citymist_222974_takp_import_v0, range=79 (116,-1,3)