NPCs composing that spawngroup :

an_ice_goblin (50%)

a_goblin_prelate (50%)

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

permafrost_9, range=90 (199,-588,3)

a_goblin_evoker (50%)
a_goblin_priest (50%)

permafrost_12, range=93 (176,-589,3)

an_ice_goblin (50%)
a_goblin_evoker (50%)

permafrost_13, range=91 (187,-589,3)

a_goblin_priest (50%)
a_goblin_scryer (50%)

permafrost_68, range=55 (169,-545,3)

an_ice_goblin (50%)
a_goblin_priest (50%)

permafrost_69, range=82 (269,-455,3)

a_goblin_evoker (50%)
a_goblin_evoker (50%)

permafrost_70, range=70 (267,-481,3)

a_goblin_prelate (50%)
a_goblin_priest (50%)

permafrost_82, range=61 (205,-437,3)

an_ice_goblin (50%)
an_ice_goblin (50%)

permafrost_84, range=94 (243,-414,4)

an_ice_goblin (50%)
an_ice_goblin (50%)

permafrost_103, range=35 (228,-478,3)

an_ice_goblin (50%)
a_goblin_priest (50%)

permafrost_104, range=88 (169,-415,3)

an_ice_goblin (100%)

permafrost_111, range=51 (207,-549,3)

an_ice_goblin (50%)
a_goblin_priest (50%)

permafrost_134, range=33 (189,-466,3)

an_ice_goblin (50%)
an_ice_goblin (50%)

permafrost_135, range=22 (177,-500,3)