NPCs composing that spawngroup :

an_ice_goblin (50%)

an_ice_goblin (50%)

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

permafrost_14, range=60 (300,-310,3)

an_ice_goblin (50%)
a_goblin_priest (50%)

permafrost_15, range=75 (288,-374,4)

a_goblin_evoker (50%)
a_goblin_prelate (50%)

permafrost_18, range=89 (311,-370,4)

permafrost_33, range=72 (168,-309,3)

an_ice_goblin (100%)
an_ice_goblin (100%)

permafrost_52, range=70 (192,-368,3)

an_ice_goblin (50%)
an_ice_goblin (50%)

permafrost_84, range=98 (243,-414,4)

an_ice_goblin (50%)
an_ice_goblin (50%)

permafrost_122, range=38 (202,-321,3)

an_ice_goblin (50%)
an_ice_goblin (50%)

permafrost_123, range=65 (301,-291,3)

an_ice_goblin (50%)
an_ice_goblin (50%)

permafrost_127, range=91 (205,-231,3)

a_goblin_priest (50%)
a_goblin_priest (50%)

permafrost_129, range=90 (150,-307,3)

an_ice_goblin (100%)

permafrost_132, range=79 (230,-395,3)

an_ice_goblin (50%)
an_ice_goblin (50%)

permafrost_134, range=58 (211,-367,3)

an_ice_goblin (50%)
an_ice_goblin (50%)