NPCs composing that spawngroup :

An_Occisor_Acerbus (2%)

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

griegsend1304000, range=92 (68,1832,-64)

griegsend1304074, range=78 (207,1770,-64)

griegsend1304247, range=90 (246,1864,-64)

A_Dark_Vision_1433073, range=69 (105,1792,-61)

A_Dark_Vision_1433078, range=53 (127,1792,-61)

A_Dark_Vision_1433081, range=30 (131,1833,-61)

A_Dark_Vision_1433098, range=47 (185,1792,-61)

A_Dark_Vision_1433099, range=24 (185,1833,-61)