NPCs composing that spawngroup :

a_diseased_mine_rat (100%)

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

nurga_35, range=37 (-1958,-931,-173)

a_goblin_back_biter (50%)
a_goblin_spirit_weaver (50%)

nurga_47, range=42 (-1903,-891,-221)

a_goblin_blightcaller (50%)
a_goblin_frost_caller (50%)

nurga_48, range=44 (-1945,-892,-221)

a_goblin_blightcaller (50%)
a_goblin_frost_caller (50%)

nurga_196, range=46 (-1877,-916,-221)

a_goblin_gold_hoarder (50%)
a_goblin_soul_stealer (50%)

nurga_197, range=88 (-1934,-1018,-221)

nurga_198, range=89 (-1892,-1015,-221)

a_goblin_soul_stealer (50%)
a_goblin_soul_stealer (50%)

va_nurga_508003, range=48 (-1874,-917,-220)

va_nurga_508009, range=92 (-1888,-1016,-220)

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