NPCs composing that spawngroup :

a_goblin_death_caster (50%)

a_goblin_overseer (50%)

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

nurga_102, range=164 (-1475,1539,-300)

a_goblin_overseer (50%)
a_goblin_overseer (50%)

nurga_126, range=169 (-1477,1549,-300)

a_goblin_spirit_chanter (100%)

nurga_164, range=159 (-1221,1369,-284)

nurga_165, range=169 (-1458,1590,-300)

a_goblin_death_caster (50%)
a_goblin_spirit_chanter (50%)

nurga_166, range=135 (-1451,1507,-300)

nurga_167, range=121 (-1430,1540,-300)

nurga_169, range=146 (-1286,1354,-284)

a_goblin_blackguard (50%)
a_goblin_death_knight (50%)

nurga_a_goblin_slavedriver1_takp_import_v0, range=144 (-1283,1356,-284)

nurga_a_goblin_backbiter5_takp_import_v0, range=122 (-1431,1538,-300)

nurga_a_goblin_stalagknight9_takp_import_v0, range=129 (-1262,1379,-284)