NPCs composing that spawngroup :

a_grimling_cadaverist (75%)

Corpseraiser_Gilgaplank (25%)

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

acrylia_a_grimling_fire_eater319, range=68 (-260,-496,-6)

a_grimling_fire_eater (50%)
a_grimling_manacrafter (50%)

acrylia_a_war_painted_skullcracker313, range=31 (-197,-421,3)

acrylia_224796, range=93 (-249,-535,-6)

acrylia_224797, range=37 (-174,-466,1)

acrylia_224798, range=37 (-173,-437,1)

a_grimling_priest (100%)

acrylia_224800, range=45 (-253,-447,2)

a_possessed_corpse (50%)
a_possessed_corpse (50%)

acrylia_224817, range=74 (-159,-507,-6)

a_grimling_deathbringer (50%)
a_grimling_priest (50%)