NPCs composing that spawngroup :

a_rock_golem (100%)

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

hole_22, range=73 (641,535,-657)

hole_23, range=50 (641,511,-657)

hole_81, range=90 (712,482,-638)

a_broken_gargoyle (50%)
a_broken_gargoyle (50%)

hole_82, range=36 (648,490,-638)

hole_84, range=18 (630,481,-904)

a_stone_ward (50%)
a_stone_ward (50%)

hole_85, range=53 (668,492,-904)

a_stone_ward (100%)

hole_117, range=95 (718,454,-655)

hole_242, range=17 (638,456,-906)

#Echo_of_Nortlav (100%)

hole_275908, range=73 (641,535,-657)

hole_275909, range=50 (641,511,-657)

hole_276015, range=90 (712,482,-638)

a_broken_gargoyle (50%)
a_broken_gargoyle (50%)

hole_276020, range=36 (648,490,-638)

hole_276024, range=18 (630,481,-904)

a_stone_ward (50%)
a_stone_ward (50%)

hole_276025, range=53 (668,492,-904)

a_stone_ward (100%)

hole_276073, range=95 (718,454,-655)

hole_276239, range=17 (638,456,-906)

#Echo_of_Nortlav (100%)

hole_276346, range=0 (623,464,-906)

a_rock_golem (100%)