NPCs composing that spawngroup :

a_goblin_back_biter (50%)

a_goblin_blood_caster (50%)

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

nurga_38, range=24 (-1943,-1256,-173)

a_goblin_life_drinker (50%)
a_goblin_miner (50%)

nurga_39, range=22 (-1933,-1295,-173)

nurga_41, range=77 (-1862,-1317,-173)

a_goblin_flame_douser (100%)

nurga_89, range=59 (-1871,-1251,-173)

a_goblin_back_biter (100%)

nurga_90, range=84 (-1867,-1213,-173)

a_goblin_blood_caster (50%)
a_goblin_blood_caster (50%)

nurga_201, range=99 (-1919,-1373,-173)

a_goblin_flame_douser (100%)

a_goblin_warder_189530, range=9 (-1935,-1277,-171)

a_goblin_warder (100%)

va_nurga_508003, range=20 (-1935,-1292,-172)

va_nurga_508030, range=9 (-1935,-1277,-172)