NPCs composing that spawngroup :

greater_scalebone (33%)

greater_scalebone (34%)

greater_skeleton (33%)

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

kurn_1, range=90 (135,-200,5)

kurn_2, range=77 (124,-191,-23)

Burynai_Excavator (50%)
Burynai_excavator (50%)

kurn_5, range=78 (103,-223,-102)

kurn_7, range=94 (129,-217,-22)

kurn_8, range=98 (108,-244,4)

kurn_10, range=65 (87,-218,-102)

kurn_17, range=96 (60,-259,-99)

Burynai_excavator (50%)
lesser_charbone_skeleton (50%)

kurn_32, range=77 (128,-151,-23)

Burynai_Excavator (100%)

kurn_37, range=95 (146,-147,-104)

kurn_39, range=55 (76,-113,-105)

kurn_42, range=52 (1,-174,-109)

kurn_43, range=42 (89,-183,-102)

kurn_63, range=90 (43,-73,-108)

Burynai_excavator (100%)
Burynai_excavator (100%)

kurn_69, range=74 (-7,-117,-105)

kurn_86, range=86 (10,-87,-106)

kurn_87, range=51 (71,-211,-24)

Burynai_burrower (50%)
Burynai_Excavator (50%)

kurn_96, range=71 (11,-104,-40)

Burynai_Excavator (50%)
greater_skeleton (50%)

kurn_139, range=93 (-41,-176,-23)

kurn_141, range=62 (1,-128,-23)

Burynai_excavator (50%)
Burynai_Excavator (50%)

kurn_142, range=84 (-20,-208,-23)

Burynai_burrower (50%)
greater_scalebone (50%)

kurn_143, range=80 (-27,-177,-23)

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

kurn_145, range=9 (46,-156,-40)

Burynai_Excavator (50%)
greater_scalebone (50%)

kurn_146, range=43 (60,-120,-40)

kurn_156, range=36 (66,-197,-104)

Burynai_excavator (50%)
Burynai_sapper (50%)

kurn_157, range=41 (11,-157,-109)

kurn_161, range=77 (0,-221,90)

greater_scalebone (90%)
undead_crusader (10%)

kurn_163, range=82 (-10,-218,132)

kurn_165, range=58 (34,-219,132)

kurn_166, range=29 (23,-161,132)

kurn_167, range=71 (-6,-121,132)

kurn_168, range=52 (0,-160,132)

kurn_174, range=77 (45,-86,130)

kurn_176, range=87 (63,-250,124)

kurn_178, range=65 (116,-175,124)

kurn_183, range=63 (41,-101,6)

greater_skeleton (100%)

kurn_276926, range=96 (-28,-218,134)

greater_scalebone (90%)
undead_crusader (10%)