NPCs composing that spawngroup :

greater_skeleton (33%)

greater_skeleton (33%)

lesser_icebone_skeleton (34%)

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

kurn_1, range=54 (87,-231,122)

greater_skeleton (100%)
greater_skeleton (100%)

kurn_2, range=94 (124,-191,-23)

Burynai_Excavator (50%)
Burynai_excavator (50%)

kurn_5, range=69 (103,-223,-102)

greater_scalebone (100%)
greater_scalebone (100%)

kurn_7, range=95 (129,-217,-22)

kurn_8, range=78 (108,-244,4)

kurn_10, range=53 (87,-218,-102)

kurn_12, range=67 (50,-285,-97)

kurn_17, range=47 (60,-259,-99)

Burynai_excavator (50%)
lesser_charbone_skeleton (50%)

kurn_29, range=99 (-65,-212,3)

kurn_35, range=75 (80,-278,-99)

kurn_41, range=80 (48,-299,-97)

Burynai_sapper (100%)

kurn_42, range=55 (1,-174,-109)

kurn_43, range=65 (89,-183,-102)

kurn_82, range=94 (-41,-276,-23)

kurn_87, range=37 (71,-211,-24)

Burynai_burrower (50%)
Burynai_Excavator (50%)

kurn_138, range=84 (-50,-210,-23)

kurn_139, range=86 (-41,-176,-23)

kurn_141, range=97 (1,-128,-23)

Burynai_excavator (50%)
Burynai_Excavator (50%)

kurn_142, range=55 (-20,-208,-23)

Burynai_burrower (50%)
greater_scalebone (50%)

kurn_143, range=74 (-27,-177,-23)

kurn_144, range=52 (75,-187,-23)

kurn_145, range=64 (46,-156,-40)

Burynai_Excavator (50%)
greater_scalebone (50%)

kurn_156, range=39 (66,-197,-104)

Burynai_excavator (50%)
Burynai_sapper (50%)

kurn_157, range=66 (11,-157,-109)

kurn_161, range=33 (0,-221,90)

greater_scalebone (90%)
undead_crusader (10%)

kurn_163, range=44 (-10,-218,132)

kurn_166, range=59 (23,-161,132)

kurn_168, range=68 (0,-160,132)

kurn_169, range=61 (0,-270,132)

kurn_173, range=90 (-55,-201,88)

kurn_175, range=58 (52,-163,124)

kurn_176, range=42 (63,-250,124)

kurn_178, range=93 (116,-175,124)

kurn_276925, range=83 (-50,-219,134)

greater_skeleton (90%)
undead_crusader (10%)

kurn_276926, range=61 (-28,-218,134)

greater_scalebone (90%)
undead_crusader (10%)