NPCs composing that spawngroup :

a_crystalline_gargoyle (33%)

a_crystal_gargoyle (34%)

a_crystal_sentinel (33%)

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

velketor_52, range=63 (-25,243,26)

velketor_59, range=77 (14,160,19)

a_crystalline_gargoyle (50%)
a_crystal_gargoyle (50%)

velketor_74, range=62 (-23,247,6)

a_crystalline_sentinel (100%)

velketor_75, range=61 (-23,235,6)

a_crystaline_sentinel (50%)
a_crystal_sentinel (50%)

velketor_88, range=63 (-25,231,26)

velketor_92, range=66 (85,188,6)

velketor_95, range=98 (18,139,11)

an_icy_watcher (100%)