NPCs composing that spawngroup :

a_rambling_fanatic (20%)

a_vapor_golem (20%)

a_vapor_golem (20%)

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

citymist_35, range=85 (102,-350,3)

a_bewildered_wanderer (50%)
a_haze_golem (50%)

citymist_54, range=92 (133,-353,39)

a_fog_golem (34%)
a_rambling_fanatic (33%)

citymist_83, range=82 (77,-343,256)

greater_war_boned_skeleton (100%)

citymist_86, range=49 (121,-312,256)

citymist_87, range=83 (136,-342,275)

citymist_92, range=60 (162,-284,76)

citymist_96, range=55 (79,-314,77)

citymist_124, range=72 (62,-207,1)

an_apparition (50%)
plaguebone_skeleton (50%)

citymist_129, range=98 (201,-286,275)

greater_war_boned_skeleton (25%)
greater_war_boned_skeleton (25%)

citymist_132, range=85 (189,-250,1)

citymist_173, range=77 (115,-188,3)