NPCs composing that spawngroup :

a_fallen_adventurer (100%)

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

hole_106, range=94 (645,132,-779)

hole_222, range=71 (695,228,-906)

hole_223, range=73 (696,207,-907)

hole_230, range=98 (629,322,-897)