NPCs composing that spawngroup :

an_ice_goblin (100%)

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

permafrost_10, range=27 (125,-318,3)

permafrost_11, range=26 (135,-329,3)

permafrost_16, range=44 (121,-341,3)

permafrost_17, range=90 (240,-316,3)

an_ice_goblin (50%)
an_ice_goblin (50%)

permafrost_22, range=90 (106,-386,3)

an_ice_goblin (50%)
a_goblin_evoker (50%)

permafrost_33, range=18 (168,-309,3)

an_ice_goblin (100%)
an_ice_goblin (100%)

permafrost_52, range=74 (192,-368,3)

an_ice_goblin (50%)
an_ice_goblin (50%)

permafrost_81, range=28 (133,-330,3)

a_goblin_evoker (50%)
a_goblin_priest (50%)

permafrost_103, range=31 (120,-315,3)

an_ice_goblin (50%)
a_goblin_priest (50%)

permafrost_122, range=53 (202,-321,3)

an_ice_goblin (50%)
an_ice_goblin (50%)

permafrost_124, range=46 (124,-345,3)

an_ice_goblin (50%)
an_ice_goblin (50%)

permafrost_127, range=93 (205,-231,3)

a_goblin_priest (50%)
a_goblin_priest (50%)

permafrost_128, range=79 (160,-228,17)

an_ice_goblin (50%)
a_goblin_prelate (50%)

permafrost_130, range=51 (138,-257,3)

an_ice_goblin (50%)
a_goblin_evoker (50%)

permafrost_134, range=85 (211,-367,3)

an_ice_goblin (50%)
an_ice_goblin (50%)