NPCs composing that spawngroup :

a_goblin_backbiter (12%)

a_goblin_blightcaller (11%)

a_goblin_boneseer (12%)

a_goblin_dirttracer (12%)

a_goblin_flashdrowser (12%)

a_goblin_slavedriver (12%)

a_goblin_stalagknight (12%)

a_goblin_stonechanter (12%)

a_goblin_warder (5%)

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

nurga_130, range=39 (-1229,-1199,-173)

a_goblin_sneak (100%)

nurga_138, range=98 (-1165,-1256,-173)

a_dangerous_mine_rat (50%)
a_goblin_death_caller (50%)

nurga_139, range=70 (-1211,-1172,-173)

a_dangerous_mine_rat (50%)
a_goblin_sneak (50%)

nurga_143, range=46 (-1213,-1237,-173)

a_dangerous_mine_rat (50%)
a_goblin_flame_dancer (50%)

nurga_145, range=87 (-1319,-1162,-173)

nurga_193, range=91 (-1349,-1214,-173)

a_goblin_life_stealer (50%)
a_goblin_slave_driver (50%)

nurga_194, range=87 (-1343,-1247,-173)

a_goblin_blight_caster (50%)
a_goblin_spirit_mystic (50%)

va_nurga_508003, range=85 (-1341,-1244,-172)

va_nurga_508013, range=89 (-1321,-1162,-172)