NPCs composing that spawngroup :

a_goblin_back_biter (50%)

a_goblin_spirit_weaver (50%)

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

nurga_37, range=77 (-2030,-959,-173)

a_goblin_life_drinker (50%)
a_goblin_miner (50%)

nurga_47, range=68 (-1903,-891,-221)

a_goblin_blightcaller (50%)
a_goblin_frost_caller (50%)

nurga_48, range=41 (-1945,-892,-221)

a_goblin_blightcaller (50%)
a_goblin_frost_caller (50%)

nurga_63, range=37 (-1921,-930,-221)

a_diseased_mine_rat (100%)

nurga_196, range=82 (-1877,-916,-221)

a_goblin_gold_hoarder (50%)
a_goblin_soul_stealer (50%)

nurga_197, range=90 (-1934,-1018,-221)

va_nurga_508003, range=85 (-1874,-917,-220)

va_nurga_508079, range=89 (-1935,-1018,-221)