NPCs composing that spawngroup :

Burynai_excavator (34%)

Burynai_sapper (33%)

greater_scalebone (33%)

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

kurn_1, range=72 (73,133,3)

greater_skeleton (100%)

kurn_8, range=86 (99,9,4)

kurn_9, range=67 (0,13,3)

scalebone_skeleton (100%)

kurn_15, range=85 (82,143,3)

kurn_34, range=23 (21,86,-116)

lesser_charbone_skeleton (100%)

kurn_44, range=62 (-9,29,-116)

kurn_66, range=95 (45,165,-116)

kurn_68, range=88 (22,-17,-118)

kurn_91, range=92 (-30,8,-39)

kurn_94, range=93 (67,-19,-39)

kurn_120, range=90 (-9,147,-49)

kurn_132, range=45 (-8,70,-39)

Burynai_excavator (50%)
Burynai_sapper (50%)

kurn_133, range=89 (-51,77,-39)

kurn_160, range=72 (66,3,9)

greater_skeleton (100%)

kurn_166, range=93 (-50,39,104)

kurn_174, range=94 (130,47,104)

kurn_183, range=42 (13,104,6)

greater_skeleton (100%)

kurn_186, range=51 (29,19,104)

kurn_187, range=86 (13,-13,104)

kurn_188, range=65 (-13,29,104)

greater_skeleton (50%)
scalebone_skeleton (50%)

kurn_189, range=59 (93,48,104)

kurn_190, range=55 (93,73,104)

kurn_191, range=72 (109,58,-39)

an_undead_jester (20%)
thick_boned_skeleton (80%)

kurn_192, range=54 (0,31,-39)

fingered_skeleton (20%)
thick_boned_skeleton (80%)

kurn_193, range=81 (-35,31,-39)

thick_boned_skeleton (100%)

#Crackling_Bones_189490, range=69 (-31,80,-39)

#Crackling_Bones (25%)
lesser_charbone_skeleton (75%)