NPCs composing that spawngroup :

A_Dark_Sending_ (2%)

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

griegsend1304111, range=55 (123,2886,-55)

griegsend1304116, range=51 (160,2985,-47)

griegsend1304117, range=90 (106,3012,-47)

griegsend1304121, range=88 (63,2938,-47)

a_mangled_clairvoyant (50%)
a_tormented_pugilist (50%)

griegsend1304122, range=68 (91,2968,-47)

griegsend1304123, range=12 (163,2931,-47)

Grieg_Veneficus__1432762, range=97 (129,2839,-42)

Grieg_Veneficus_ (2%)

A_Dark_sending_1432867, range=75 (78,2952,-43)

A_Dark_Vision_ (50%)
A_Vereor_Tesserarius_ (50%)

A_Dark_sending_1432870, range=88 (97,2864,-52)

A_Dark_Sending_ (2%)

A_Dark_sending_1432881, range=37 (151,2897,-49)

A_Dark_Vision_1433061, range=92 (86,3000,-43)

An_Occisor_Acerbus (2%)
A_Dark_Vision (2%)

A_Dark_Vision_1433079, range=73 (128,2864,-52)

A_Dark_Vision (2%)

A_Dark_Sending__1433161, range=61 (113,2886,-54)