NPCs composing that spawngroup :

Burynai_excavator (33%)

Burynai_sapper (34%)

greater_scalebone (33%)

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

kurn_1, range=95 (135,-200,5)

kurn_2, range=98 (124,-191,-23)

Burynai_Excavator (50%)
Burynai_excavator (50%)

kurn_5, range=60 (103,-223,-102)

greater_scalebone (100%)

kurn_7, range=86 (45,-357,-22)

kurn_8, range=44 (108,-244,4)

kurn_10, range=60 (87,-218,-102)

kurn_12, range=30 (50,-285,-97)

kurn_17, range=27 (60,-259,-99)

Burynai_excavator (50%)
lesser_charbone_skeleton (50%)

kurn_41, range=38 (48,-299,-97)

Burynai_sapper (100%)

kurn_43, range=95 (89,-183,-102)

kurn_81, range=94 (174,-280,-23)

kurn_87, range=68 (71,-211,-24)

Burynai_burrower (50%)
Burynai_Excavator (50%)

kurn_144, range=91 (75,-187,-23)

kurn_156, range=82 (66,-197,-104)

Burynai_excavator (50%)
Burynai_sapper (50%)

kurn_161, range=98 (0,-221,90)

greater_scalebone (90%)
undead_crusader (10%)

kurn_165, range=74 (34,-219,132)

kurn_166, range=54 (32,-253,132)

kurn_169, range=80 (0,-270,132)

kurn_176, range=32 (63,-250,124)