NPCs composing that spawngroup :

Burynai_excavator (33%)

Burynai_excavator (34%)

lesser_icebone_skeleton (33%)

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

kurn_1, range=51 (135,-200,5)

kurn_2, range=46 (124,-191,-23)

Burynai_Excavator (50%)
Burynai_excavator (50%)

kurn_5, range=16 (103,-223,-102)

greater_scalebone (100%)
greater_scalebone (100%)

kurn_7, range=42 (129,-217,-22)

kurn_8, range=33 (108,-244,4)

kurn_12, range=76 (50,-285,-97)

kurn_17, range=49 (60,-259,-99)

Burynai_excavator (50%)
lesser_charbone_skeleton (50%)

kurn_32, range=79 (128,-151,-23)

Burynai_Excavator (100%)

kurn_33, range=85 (172,-225,-102)

Burynai_sapper (100%)

kurn_35, range=60 (80,-278,-99)

kurn_37, range=92 (146,-147,-104)

kurn_41, range=89 (48,-299,-97)

Burynai_sapper (100%)

kurn_42, range=96 (1,-174,-109)

kurn_43, range=35 (89,-183,-102)

kurn_87, range=17 (71,-211,-24)

Burynai_burrower (50%)
Burynai_Excavator (50%)

kurn_89, range=70 (151,-190,-25)

kurn_144, range=33 (75,-187,-23)

kurn_145, range=74 (46,-156,-40)

Burynai_Excavator (50%)
greater_scalebone (50%)

kurn_156, range=29 (66,-197,-104)

Burynai_excavator (50%)
Burynai_sapper (50%)

kurn_157, range=97 (11,-157,-109)

kurn_161, range=86 (0,-221,90)

greater_scalebone (90%)
undead_crusader (10%)

kurn_163, range=97 (-10,-218,132)

kurn_165, range=53 (34,-219,132)

kurn_166, range=85 (23,-161,132)

kurn_175, range=65 (52,-163,124)

kurn_176, range=40 (63,-250,124)

kurn_178, range=51 (116,-175,124)