NPCs composing that spawngroup :

an_abhorrent (100%)

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

spawn20347, range=121 (-25,-342,-103)

spawn17988, range=181 (-193,-318,6)

spawn16200, range=175 (-67,-279,28)

spawn13526, range=164 (55,-350,4)

spawn13522, range=17 (-59,-444,104)

spawn11350, range=13 (-75,-467,105)

spawn11349, range=191 (66,-323,103)

spawn10015, range=107 (-60,-347,30)

Suddenly_189341, range=77 (-147,-431,103)