NPCs composing that spawngroup :

an_ice_goblin (50%)

an_ice_goblin (50%)

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

permafrost_14, range=71 (300,-310,3)

an_ice_goblin (50%)
a_goblin_priest (50%)

permafrost_15, range=88 (288,-374,4)

a_goblin_evoker (50%)
a_goblin_prelate (50%)

permafrost_18, range=66 (311,-370,4)

permafrost_19, range=32 (348,-361,3)

an_ice_goblin (50%)
an_ice_goblin (50%)

permafrost_63, range=53 (406,-298,3)

an_ice_goblin (50%)
a_goblin_mendicant (50%)

permafrost_104, range=93 (327,-251,3)

an_ice_goblin (100%)

permafrost_120, range=73 (374,-262,3)

an_ice_goblin (50%)
an_ice_goblin (50%)

permafrost_121, range=53 (381,-283,3)

an_ice_goblin (50%)
a_goblin_prelate (50%)

permafrost_123, range=79 (301,-291,3)

an_ice_goblin (50%)
an_ice_goblin (50%)

permafrost_125, range=79 (445,-322,3)

an_ice_goblin (50%)
a_goblin_diviner (50%)