NPCs composing that spawngroup :

a_goblin_spirit_mystic (50%)

a_vicious_mine_rat (50%)

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

nurga_27, range=21 (-1591,-500,-189)

a_goblin_life_stealer (50%)
a_goblin_stabber (50%)

nurga_28, range=39 (-1567,-519,-189)

a_goblin_blight_caster (50%)
a_goblin_blight_caster (50%)

va_nurga_508009, range=23 (-1592,-502,-188)

va_nurga_508013, range=6 (-1581,-476,-188)