NPCs composing that spawngroup :

An_Atra_Somnium (2%)

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

griegsend1304071, range=88 (70,1666,-60)

griegsend1304072, range=88 (99,1652,-64)

griegsend1304074, range=91 (207,1770,-64)

a_tormented_pugilist (50%)
a_tormented_pugilist (50%)

A_Dark_Vision_1433046, range=95 (45,1680,-61)

A_Dark_Vision (2%)

A_Dark_Vision_1433070, range=34 (105,1707,-61)

An_Occisor_Acerbus (2%)

A_Dark_Vision_1433073, range=57 (105,1792,-61)

An_Occisor_Acerbus (2%)
A_Dark_Vision (2%)

A_Dark_Vision_1433078, range=55 (127,1792,-61)

A_Dark_Vision (2%)

A_Dark_Vision_1433081, range=96 (131,1833,-61)

A_Dark_Vision (2%)

A_Dark_Vision_1433082, range=14 (136,1736,-62)

A_Dark_Vision (2%)

A_Dark_Vision_1433098, range=83 (185,1792,-61)

A_Dark_Vision (2%)