NPCs composing that spawngroup :

a_spirit_of_the_old_city (100%)

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

hole_25, range=23 (-30,-76,-294)

an_elemental_capturer (50%)
a_destroyed_construct (50%)

hole_32, range=80 (-78,-10,-346)

a_destroyed_construct (100%)

hole_34, range=56 (-90,-45,-316)

hole_41, range=54 (-104,-74,-291)

hole_42, range=30 (-74,-106,-276)

hole_43, range=33 (-74,-62,-274)

hole_64, range=77 (23,-64,-301)

a_spirit_of_the_ruins (50%)
a_spirit_of_the_ruins (50%)

hole_70, range=35 (-77,-62,-232)

hole_114, range=78 (14,-42,-276)

hole_115, range=50 (-26,-42,-276)

hole_124, range=45 (-6,-93,-276)

#an_old_construct (50%)
a_destroyed_construct (50%)

hole_152, range=26 (-76,-94,-232)

#an_old_gargoyle (5%)
a_destroyed_gargoyle (95%)

an_elemental_capture_189540, range=23 (-54,-63,-277)

an_elemental_capturer (50%)
a_rock_golem (50%)

a_flighty_fiend_189560, range=30 (-21,-83,-276)

a_flighty_fiend (100%)

an_elemental_wizard_189567, range=33 (-84,-85,-272)

an_elemental_wizard (100%)

an_elemental_harvest_189590, range=20 (-52,-106,-301)

an_elemental_harvester (100%)

a_rock_golem_189609, range=86 (33,-67,-277)

a_rock_golem (100%)

an_elemental_channel_189671, range=72 (6,-41,-276)

an_elemental_channeler (100%)

va_hole_25, range=23 (-30,-76,-294)

an_elemental_capturer (50%)

va_hole_42, range=30 (-74,-106,-276)

a_flighty_fiend (34%)
a_flighty_fiend (34%)

va_hole_43, range=33 (-74,-62,-274)

va_hole_114, range=78 (14,-42,-276)

va_hole_115, range=50 (-26,-42,-276)

va_an_elemental_capture_189540, range=23 (-54,-63,-277)

an_elemental_capturer (50%)
a_rock_golem (50%)

va_a_flighty_fiend_189560, range=30 (-21,-83,-276)

a_flighty_fiend (100%)

va_an_elemental_wizard_189567, range=33 (-84,-85,-272)

an_elemental_wizard (100%)

va_an_elemental_harvest_189590, range=20 (-52,-106,-301)

an_elemental_harvester (100%)

va_a_rock_golem_189609, range=86 (33,-67,-277)

a_rock_golem (100%)

va_an_elemental_channel_189671, range=72 (6,-41,-276)

an_elemental_channeler (100%)