NPCs composing that spawngroup :

greater_skeleton (33%)

greater_skeleton (33%)

scalebone_skeleton (34%)

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

kurn_1, range=12 (73,133,3)

greater_skeleton (100%)

kurn_9, range=31 (97,170,21)

scalebone_skeleton (100%)

kurn_11, range=28 (110,143,3)

greater_scalebone (50%)
greater_skeleton (50%)

kurn_13, range=93 (162,192,3)

kurn_22, range=66 (140,175,3)

kurn_34, range=82 (21,86,-116)

lesser_charbone_skeleton (100%)

kurn_59, range=58 (139,129,-116)

Burynai_excavator (50%)
Burynai_sapper (50%)

kurn_60, range=78 (152,177,-116)

Burynai_sapper (100%)

kurn_61, range=89 (165,176,-116)

Burynai_excavator (50%)
lesser_icebone_skeleton (50%)

kurn_62, range=42 (64,182,-116)

kurn_65, range=86 (166,121,-116)

kurn_66, range=43 (45,165,-116)

kurn_67, range=74 (15,176,-116)

kurn_74, range=85 (38,70,-116)

kurn_104, range=74 (154,123,-39)

kurn_116, range=82 (39,213,-49)

Burynai_Excavator (100%)

kurn_120, range=91 (-9,147,-49)

kurn_122, range=83 (21,200,-49)

Burynai_Excavator (50%)
Burynai_sapper (50%)

kurn_123, range=61 (39,187,-49)

Burynai_excavator (100%)

kurn_128, range=95 (72,238,-39)

kurn_183, range=79 (13,104,6)

greater_skeleton (100%)

kurn_189, range=95 (93,48,104)

kurn_190, range=70 (93,73,104)

kurn_191, range=88 (109,58,-39)

an_undead_jester (20%)
thick_boned_skeleton (80%)