NPCs composing that spawngroup :

a_goblin_blightcaller (50%)

a_goblin_frost_caller (50%)

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

nurga_32, range=93 (-1534,-901,-172)

a_goblin_blight_caster (50%)
a_goblin_spirit_mystic (50%)

nurga_33, range=99 (-1449,-996,-173)

a_goblin_life_stealer (50%)
a_goblin_slave_driver (50%)

nurga_34, range=70 (-1481,-1014,-173)

a_goblin_arcane_master (100%)

nurga_46, range=44 (-1505,-983,-221)

a_goblin_gold_hoarder (100%)

nurga_47, range=35 (-1527,-964,-221)

a_goblin_blightcaller (50%)
a_goblin_frost_caller (50%)

nurga_49, range=95 (-1517,-903,-221)

#Frost_Caller_Ollikaz (20%)
a_goblin_frost_caller (80%)

nurga_50, range=95 (-1550,-898,-221)

nurga_51, range=89 (-1590,-914,-221)

a_goblin_slave_keeper (50%)
a_goblin_soul_stealer (50%)

nurga_52, range=66 (-1551,-927,-221)

a_goblin_blightcaller (50%)
a_goblin_frost_caller (50%)

va_nurga_508003, range=46 (-1504,-979,-220)

va_nurga_508009, range=2 (-1550,-991,-220)

va_nurga_508057, range=93 (-1550,-900,-220)