NPCs composing that spawngroup :

a_goblin_blackguard (33%)

a_goblin_warder (34%)

a_menacing_mine_rat (33%)

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

nurga_92, range=41 (-1165,628,-189)

nurga_99, range=38 (-1193,580,-189)

a_goblin_flame_chanter (50%)
a_goblin_spirit_chanter (50%)

nurga_100, range=75 (-1130,619,-189)

nurga_101, range=140 (-1128,499,-189)

nurga_102, range=109 (-1170,513,-189)

a_goblin_overseer (50%)
a_goblin_overseer (50%)

nurga_182, range=40 (-1190,655,-189)

a_goblin_death_caster (50%)
a_goblin_death_knight (50%)

nurga_a_goblin_slavedriver1_takp_import_v0, range=72 (-1133,620,-188)

nurga_a_goblin_backbiter5_takp_import_v0, range=110 (-1171,512,-188)

nurga_a_goblin_stonechanter26_takp_import_v0, range=44 (-1188,658,-188)