NPCs composing that spawngroup :

a_velium_hunter (33%)

a_velium_stalker (33%)

The_Brood_Mother (34%)

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

velketor_1, range=98 (256,8,-15)

velketor_53, range=80 (107,47,8)

a_crystal_gargoyle (100%)

velketor_55, range=61 (178,135,-54)

Velketor_the_Sorcerer (100%)

velketor_59, range=95 (124,-1,66)

velketor_61, range=16 (197,66,-112)

a_velium_stalker (50%)
The_Brood_Master (50%)

velketor_62, range=78 (105,85,-73)

velketor_65, range=79 (105,60,-73)

velketor_92, range=39 (172,112,6)

velketor_93, range=86 (140,-1,10)

velketor_94, range=24 (172,96,-58)

Crystal_Guardian (100%)

six_189764, range=60 (179,14,-109)

A_chill (50%)
six (50%)

velketor_99114, range=44 (225,59,-187)