NPCs composing that spawngroup :

a_goblin_blightcaller (50%)

a_goblin_frost_caller (50%)

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

nurga_32, range=63 (-1534,-901,-172)

a_goblin_blight_caster (50%)
a_goblin_spirit_mystic (50%)

nurga_33, range=84 (-1449,-996,-173)

a_goblin_life_stealer (50%)
a_goblin_slave_driver (50%)

nurga_34, range=68 (-1481,-1014,-173)

a_goblin_arcane_master (100%)

nurga_46, range=29 (-1505,-983,-221)

a_goblin_gold_hoarder (100%)

nurga_48, range=35 (-1548,-993,-221)

a_goblin_blightcaller (50%)
a_goblin_frost_caller (50%)

nurga_49, range=61 (-1517,-903,-221)

#Frost_Caller_Ollikaz (20%)
a_goblin_frost_caller (80%)

nurga_50, range=69 (-1550,-898,-221)

nurga_51, range=80 (-1590,-914,-221)

a_goblin_slave_keeper (50%)
a_goblin_soul_stealer (50%)

nurga_52, range=44 (-1551,-927,-221)

a_goblin_blightcaller (50%)
a_goblin_frost_caller (50%)

a_Burynai_slave_189526, range=69 (-1509,-897,-221)

a_Burynai_slave (100%)

va_nurga_508003, range=27 (-1504,-979,-220)

va_nurga_508009, range=35 (-1550,-991,-220)

va_nurga_508047, range=86 (-1448,-998,-172)

va_nurga_508057, range=68 (-1550,-900,-220)

va_nurga_508079, range=69 (-1509,-897,-221)