NPCs composing that spawngroup :

an_ice_goblin (50%)

a_goblin_priest (50%)

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

permafrost_10, range=84 (125,-318,3)

permafrost_11, range=79 (135,-329,3)

permafrost_16, range=61 (121,-341,3)

permafrost_20, range=17 (77,-385,3)

a_goblin_evoker (50%)
a_goblin_priest (50%)

permafrost_22, range=17 (106,-386,3)

an_ice_goblin (50%)
a_goblin_evoker (50%)

permafrost_23, range=65 (48,-345,3)

an_ice_goblin (50%)
a_goblin_priest (50%)

permafrost_24, range=89 (50,-315,3)

an_ice_goblin (50%)
a_goblin_evoker (50%)

permafrost_25, range=76 (47,-333,3)

an_ice_goblin (50%)
a_goblin_priest (50%)

permafrost_81, range=77 (133,-330,3)

a_goblin_evoker (50%)
a_goblin_priest (50%)

permafrost_103, range=85 (120,-315,3)

an_ice_goblin (50%)
a_goblin_priest (50%)

permafrost_104, range=80 (169,-415,3)

an_ice_goblin (100%)

permafrost_124, range=59 (124,-345,3)

an_ice_goblin (50%)
an_ice_goblin (50%)

permafrost_137, range=52 (141,-412,3)

an_ice_goblin (100%)