NPCs composing that spawngroup :

an_ice_goblin (50%)

a_goblin_prelate (50%)

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

permafrost_10, range=81 (125,-318,3)

permafrost_11, range=95 (135,-329,3)

permafrost_16, range=89 (121,-341,3)

permafrost_23, range=57 (48,-345,3)

an_ice_goblin (50%)
a_goblin_priest (50%)

permafrost_24, range=27 (50,-315,3)

an_ice_goblin (50%)
a_goblin_evoker (50%)

permafrost_25, range=45 (47,-333,3)

an_ice_goblin (50%)
a_goblin_priest (50%)

permafrost_30, range=32 (48,-256,3)

an_ice_goblin (50%)
a_goblin_diviner (50%)

permafrost_31, range=18 (45,-270,3)

permafrost_81, range=93 (133,-330,3)

a_goblin_evoker (50%)
a_goblin_priest (50%)

permafrost_82, range=73 (46,-215,3)

an_ice_goblin (50%)
an_ice_goblin (50%)

permafrost_83, range=86 (40,-202,3)

an_ice_goblin (50%)
a_goblin_priest (50%)

permafrost_103, range=75 (120,-315,3)

an_ice_goblin (50%)
a_goblin_priest (50%)

permafrost_124, range=94 (124,-345,3)

an_ice_goblin (50%)
an_ice_goblin (50%)

permafrost_130, range=94 (138,-257,3)

an_ice_goblin (50%)
a_goblin_evoker (50%)