NPCs composing that spawngroup :

a_goblin_arcane_master (50%)

a_goblin_spirit_mystic (50%)

NPCs spawning around that spawngroup :
(Max range : 200)

nurga_65, range=173 (-1894,-1834,21)

a_goblin_life_stealer (50%)
a_goblin_spirit_mystic (50%)

nurga_66, range=176 (-1920,-1810,25)

a_goblin_arcane_master (50%)
a_goblin_blight_caster (50%)

nurga_67, range=84 (-2055,-1883,18)

nurga_69, range=108 (-2081,-1871,17)

a_goblin_slave_driver (100%)

nurga_187, range=77 (-2084,-1921,21)

a_goblin_life_stealer (50%)
a_goblin_slave_driver (50%)

nurga_a_goblin_slavedriver1_takp_import_v0, range=174 (-1921,-1812,28)

nurga_a_goblin_blightcaller58_takp_import_v0, range=174 (-1891,-1836,22)