NPCs composing that spawngroup :

a_goblin_flashdrowser (34%)

a_goblin_spirit_chanter (33%)

a_goblin_spirit_chanter (33%)

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

nurga_102, range=76 (-1227,1230,-284)

a_goblin_overseer (50%)
a_goblin_overseer (50%)

nurga_128, range=34 (-1246,1189,-284)

a_goblin_blackguard (100%)

nurga_133, range=26 (-1219,1144,-284)

a_goblin_flame_chanter (50%)
a_goblin_flame_chanter (50%)

nurga_170, range=45 (-1202,1174,-284)

va_nurga_508006, range=3 (-1243,1158,-284)

va_nurga_508009, range=75 (-1224,1228,-284)