NPCs composing that spawngroup :

#Mistress_A`Zara (20%)

a_forsaken_revenant (80%)

NPCs spawning around that spawngroup :
(Max range : 200)

hateplaneb_9, range=93 (-642,-816,6)

a_fury_ghast (100%)

hateplaneb_18, range=41 (-522,-845,5)

hateplaneb_19, range=110 (-495,-718,3)

a_phantom_chest (100%)

hateplaneb_20, range=191 (-403,-690,5)

a_sinister_lich (100%)

hateplaneb_55, range=152 (-489,-674,4)

a_hatebone_drake (100%)

hateplaneb_58, range=180 (-616,-646,12)

a_vengeance_golem (100%)

hateplaneb_63, range=127 (-496,-698,8)

a_vile_rat (100%)

hateplaneb_64, range=89 (-497,-741,16)

a_greater_kiraikuei (100%)

hateplaneb_66, range=178 (-673,-686,5)

a_forlorn_revenant (100%)

hateplaneb_79, range=151 (-672,-726,3)

a_phantom_chest (100%)

hateplaneb_89, range=62 (-610,-799,5)

a_vicar_of_hate (100%)

hateplaneb_90, range=82 (-566,-733,6)

a_grim_abhorrent (100%)

hateplaneb_91, range=140 (-661,-730,4)

a_sinister_lich (100%)
a_sinister_lich (100%)

hateplaneb_96, range=160 (-705,-777,5)

hateplaneb_97, range=197 (-746,-815,9)

a_forlorn_revenant (100%)
a_forlorn_revenant (100%)

hateplaneb_111, range=176 (-725,-801,10)

a_fury_ghast (100%)
a_fury_ghast (100%)

hateplaneb_123, range=46 (-566,-857,5)

a_grim_abhorrent (100%)

hateplaneb_125, range=80 (-610,-866,1)

a_hatebone_drake (100%)

hateplaneb_126, range=20 (-569,-819,9)

a_sinister_lich (100%)

hateplaneb_127, range=121 (-459,-733,6)

a_malevolent_banshee (100%)