NPCs composing that spawngroup :

a_goblin_arcane_master (25%)

a_goblin_flashdrowser (25%)

a_goblin_stabber (25%)

a_goblin_warder (25%)

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

nurga_22, range=25 (-1474,-616,-189)

nurga_24, range=39 (-1468,-601,-189)

a_goblin_arcane_master (50%)
a_goblin_spirit_mystic (50%)

nurga_27, range=40 (-1512,-666,-189)

a_goblin_life_stealer (50%)
a_goblin_stabber (50%)

nurga_31, range=80 (-1572,-604,-189)

a_goblin_arcane_master (50%)
a_vicious_mine_rat (50%)

va_nurga_508003, range=38 (-1468,-603,-188)

va_nurga_508009, range=3 (-1493,-628,-188)