NPCs composing that spawngroup :

#volatilis_monitor (2%)

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

tenebrous1376054, range=63 (529,-1140,143)

a_coterie_centurion (50%)
a_coterie_centurion (50%)

tenebrous1376053, range=78 (650,-1135,143)

a_coterie_centurion (50%)
a_coterie_centurion (50%)

tenebrous1376052, range=84 (659,-1075,15)

tenebrous1376037, range=97 (490,-1141,316)

a_coterie_general (100%)

tenebrous1376035, range=76 (655,-1090,317)

a_coterie_general (100%)

tenebrous1376034, range=89 (491,-1087,257)

#invisible_trigger_o_1433505, range=31 (579,-1132,576)

#invisible_trigger_one (2%)

tenebrous_castle_entry_1, range=89 (516,-1038,13)

tenebrous_castle_entry_2, range=65 (563,-1038,18)