NPCs composing that spawngroup :

orc_centurion (100%)

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

crushbone_3, range=70 (274,-136,-27)

crushbone_10, range=87 (281,-25,-17)

an_elven_slave (50%)
a_dwarven_slave (50%)

crushbone_11, range=17 (228,-105,-11)

an_elven_slave (50%)
a_dwarven_slave (50%)

crushbone_28, range=57 (177,-53,6)

orc_emissary (100%)

crushbone_49, range=47 (184,-117,4)

orc_centurion (50%)
orc_pawn (50%)

crushbone_55, range=99 (154,-16,22)

orc_centurion (50%)
orc_legionnaire (50%)

crushbone_69, range=48 (206,-135,3)

orc_slaver (50%)
orc_slaver (50%)

crushbone_70, range=67 (245,-152,4)

orc_taskmaster (100%)

crushbone_76, range=73 (192,-22,6)

orc_warlord (100%)