NPCs composing that spawngroup :

orc_slaver (33%)

orc_slaver (33%)

orc_slaver (34%)

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

crushbone_1, range=69 (3,387,-14)

crushbone_7, range=39 (103,398,-15)

crushbone_8, range=41 (79,375,-15)

a_dwarven_slave (50%)
a_dwarven_slave (50%)

crushbone_9, range=94 (122,492,-15)

a_dwarven_slave (100%)

crushbone_54, range=28 (42,428,-12)

orc_slaver (50%)
orc_slaver (50%)

crushbone_74, range=44 (107,435,-13)

Orc_Warden (100%)

crushbone_75, range=80 (129,465,17)

orc_pawn (100%)