NPCs composing that spawngroup :

an_elemental_harvester (50%)

Stonesoul_the_Unmoving (50%)

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

hole_16, range=53 (614,-152,-233)

a_citybound_spirit (100%)

hole_18, range=75 (554,-168,-231)

hole_19, range=99 (572,-200,-233)

a_citybound_spirit (50%)
a_citybound_spirit (50%)

an_elemental_wizard_189574, range=28 (599,-131,-233)

an_elemental_wizard (50%)
bejeweled_elemental (50%)

a_rock_golem_189647, range=79 (536,-159,-225)

a_rock_golem (100%)

a_rock_golem_189649, range=29 (587,-132,-233)

a_rock_golem (100%)

va_hole_16, range=53 (614,-152,-233)

a_rock_golem (50%)

va_hole_18, range=75 (554,-168,-231)

va_Stonesoul_the_Unmovi_189539, range=0 (593,-103,-231)

an_elemental_harvester (50%)

va_an_elemental_wizard_189574, range=28 (599,-131,-233)

an_elemental_wizard (50%)
bejeweled_elemental (50%)

va_a_rock_golem_189647, range=82 (530,-158,-231)

a_rock_golem (100%)

va_a_rock_golem_189649, range=29 (587,-132,-233)

a_rock_golem (100%)