NPCs composing that spawngroup :

an_abhorrent (100%)

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

hateplaneb_7, range=99 (502,-598,4)

hateplaneb_33, range=67 (595,-542,2)

an_ashenbone_drake (100%)

hateplaneb_34, range=90 (565,-591,4)

a_cleric_of_hate (100%)

hateplaneb_49, range=53 (584,-478,14)

a_loathing_lich (100%)

hateplaneb_76, range=43 (525,-546,5)

a_forsaken_revenant (50%)
a_forsaken_revenant (50%)

hateplaneb_133, range=28 (540,-477,13)

a_haunted_chest (100%)

hateplaneb_139, range=82 (522,-586,5)

a_forsaken_revenant (50%)
a_forsaken_revenant (50%)

hateplaneb_150, range=71 (541,-434,13)

a_haunted_chest (50%)
a_repulsive_rat (50%)

hateplaneb_151, range=82 (583,-436,14)

a_cleric_of_hate (50%)
a_forsaken_revenant (50%)