NPCs composing that spawngroup :

an_ice_goblin (50%)

a_goblin_evoker (25%)

a_goblin_priest (25%)

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

permafrost_1, range=75 (192,-368,3)

permafrost_9, range=16 (133,-330,3)

a_goblin_evoker (50%)
a_goblin_priest (50%)

permafrost_10, range=23 (125,-318,3)

permafrost_11, range=18 (135,-329,3)

permafrost_12, range=47 (106,-386,3)

permafrost_14, range=61 (91,-395,3)

permafrost_19, range=56 (168,-309,3)

permafrost_20, range=62 (77,-385,3)

a_goblin_evoker (50%)
a_goblin_priest (50%)

permafrost_29, range=89 (49,-288,3)

an_ice_goblin (50%)
a_goblin_prelate (50%)

permafrost_34, range=85 (138,-257,3)

an_ice_goblin (50%)
a_goblin_evoker (50%)

permafrost_61, range=26 (120,-315,3)

an_ice_goblin (50%)
a_goblin_priest (50%)