NPCs composing that spawngroup :

#A_Dread_Wraith (10%)

a_mist_golem (40%)

a_mist_golem (25%)

greater_war_boned_skeleton (25%)

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

citymist_35, range=34 (102,-350,3)

a_bewildered_wanderer (50%)
a_haze_golem (50%)

citymist_54, range=11 (133,-353,39)

a_fog_golem (34%)
a_rambling_fanatic (33%)

citymist_61, range=22 (130,-364,-13)

citymist_62, range=91 (227,-348,-14)

a_shadow (25%)
plaguebone_skeleton (25%)

citymist_83, range=58 (77,-343,256)

greater_war_boned_skeleton (100%)

citymist_85, range=34 (121,-373,256)

citymist_86, range=33 (121,-312,256)

citymist_88, range=82 (199,-396,275)

citymist_92, range=63 (162,-284,76)

citymist_93, range=97 (212,-281,76)

citymist_96, range=63 (79,-314,77)

citymist_116, range=58 (182,-378,65)

citymist_117, range=79 (214,-349,64)

citymist_127, range=84 (219,-328,274)

citymist_128, range=55 (189,-325,274)

citymist_129, range=85 (201,-286,275)

greater_war_boned_skeleton (25%)
greater_war_boned_skeleton (25%)

citymist_159, range=83 (105,-265,2)