NPCs composing that spawngroup :

a_goblin_death_caster (33%)

a_goblin_flashdrowser (34%)

a_goblin_spirit_chanter (33%)

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

nurga_92, range=134 (-1165,628,-189)

nurga_96, range=140 (-1205,617,-189)

nurga_99, range=103 (-1193,580,-189)

a_goblin_flame_chanter (50%)
a_goblin_spirit_chanter (50%)

nurga_100, range=120 (-1130,619,-189)

nurga_102, range=44 (-1170,513,-189)

a_goblin_overseer (50%)
a_goblin_overseer (50%)

nurga_104, range=123 (-1147,377,-189)

a_goblin_death_knight (50%)
a_goblin_spirit_chanter (50%)

nurga_182, range=167 (-1190,655,-189)

a_goblin_death_caster (50%)
a_goblin_death_knight (50%)

nurga_183, range=126 (-1113,373,-189)

a_goblin_blackguard (50%)
a_goblin_death_knight (50%)

nurga_a_goblin_warder0_takp_import_v0, range=102 (-1129,397,-188)

nurga_a_goblin_slavedriver1_takp_import_v0, range=121 (-1133,620,-188)

nurga_a_goblin_backbiter5_takp_import_v0, range=44 (-1171,512,-188)

nurga_a_goblin_stonechanter26_takp_import_v0, range=169 (-1188,658,-188)