NPCs composing that spawngroup :

a_goblin_back_biter (50%)

a_goblin_life_drinker (50%)

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

nurga_42, range=27 (-2102,-1598,-191)

a_goblin_blood_caster (100%)

nurga_44, range=97 (-2110,-1502,-173)

a_goblin_blood_caster (50%)
a_goblin_spirit_weaver (50%)

va_nurga_508003, range=98 (-2065,-1523,-172)

va_nurga_508009, range=72 (-2117,-1527,-172)