NPCs composing that spawngroup :

#Bledrek (20%)

a_crystal_sentinel (80%)

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

velketor_52, range=50 (-25,243,26)

velketor_74, range=52 (-23,247,6)

a_crystalline_sentinel (100%)

velketor_75, range=55 (-23,235,6)

a_crystaline_sentinel (50%)
a_crystal_sentinel (50%)

velketor_88, range=54 (-25,231,26)

velketor_91, range=0 (-75,253,6)

#Bledrek (20%)
a_crystal_sentinel (80%)

velketor_289163, range=50 (-25,243,26)

velketor_289235, range=52 (-23,247,6)

a_crystalline_sentinel (100%)

velketor_289237, range=55 (-23,235,6)

a_crystaline_sentinel (50%)
a_crystal_sentinel (50%)

velketor_289250, range=54 (-25,231,26)