NPCs composing that spawngroup :

Vessel_Grymm (50%)

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

cabeast_6, range=79 (993,-86,15)

cabeast_10, range=96 (1013,-257,-25)

Sarth_Scarscale (50%)

cabeast_32, range=97 (942,-97,3)

Crusader_Olos (50%)

cabeast_66, range=49 (1037,-206,73)

Librarian_Zimor (50%)

cabeast_87, range=58 (1000,-105,45)

Squire_Gristle (50%)

cabeast_89, range=61 (1059,-205,45)

#Prime_Patriarch_Vuzx (50%)

cabeast_91, range=59 (1039,-216,18)

Vessel_Kirtokk (50%)

cabeast_92, range=56 (1025,-217,18)

Vessel_Drekk (50%)

cabeast_93, range=15 (1031,-159,18)

Vessel_Migron (50%)

cabeast_94, range=34 (1050,-159,18)

Vessel_Mortyr (50%)

cabeast_96, range=64 (1050,-216,18)

Vessel_Grott (50%)

cabeast_97, range=59 (1011,-220,18)

Vessel_Kabda (50%)

cabeast_107, range=55 (1055,-200,20)

Hierophant_Zand (50%)

cabeast_108, range=41 (1054,-177,20)

Hierophant_Oxyn (50%)

cabeast_109, range=39 (1044,-189,21)

Prime_Hierophant_Vek (50%)

cabeast_110, range=54 (1029,-108,-11)

Gaxl_the_scribe (50%)

cabeast_111, range=14 (1005,-151,45)

Lord_Qyzar (50%)

cabeast_112, range=47 (1062,-173,45)

Lord_Korzin (50%)

cabeast_113, range=18 (1034,-165,45)

Lord_Gikzic (50%)

cabeast_114, range=28 (1014,-189,73)

Arch_Duke_Xog (50%)

cabeast_121, range=28 (1024,-188,45)

Slithreina (50%)

cabeast_124, range=29 (1026,-189,59)

Zreezas (50%)

betabstgmspawner_189517, range=59 (1067,-191,59)

betabstgmspawner (50%)

cabeast_55118, range=73 (1055,-223,46)

Elder_Patriarch_Ixthal (50%)