NPCs composing that spawngroup :

a_goblin_flame_douser (33%)

a_goblin_flashdrowser (34%)

a_goblin_spirit_weaver (33%)

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

nurga_82, range=72 (-2068,-1226,-173)

a_goblin_back_biter (50%)
a_goblin_life_drinker (50%)

nurga_83, range=64 (-2096,-1243,-173)

nurga_84, range=32 (-2080,-1270,-173)

a_goblin_miner (50%)
a_goblin_miner (50%)

va_nurga_508003, range=4 (-2059,-1297,-172)

va_nurga_508006, range=74 (-2065,-1224,-172)

va_nurga_508047, range=64 (-2099,-1245,-172)