NPCs composing that spawngroup :

Burynai_burrower (33%)

Burynai_Excavator (34%)

greater_scalebone (33%)

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

kurn_1, range=83 (-121,-186,6)

greater_skeleton (100%)

kurn_3, range=55 (-73,-311,-23)

kurn_7, range=22 (-90,-254,3)

kurn_8, range=34 (-142,-272,4)

kurn_25, range=96 (-172,-340,-23)

kurn_27, range=72 (-149,-208,-23)

kurn_29, range=70 (-65,-212,3)

kurn_73, range=35 (-108,-233,-23)

kurn_80, range=69 (-72,-208,-23)

kurn_82, range=67 (-41,-276,-23)

kurn_83, range=65 (-58,-310,-23)

kurn_84, range=37 (-118,-304,-23)

Burynai_Excavator (50%)
Burynai_Excavator (50%)

kurn_113, range=42 (-87,-231,-22)

Burynai_burrower (50%)
Burynai_excavator (50%)

kurn_130, range=46 (-143,-238,-23)

kurn_137, range=42 (-103,-310,-22)

kurn_138, range=82 (-50,-210,-23)

kurn_144, range=45 (-141,-299,-22)

kurn_164, range=43 (-83,-232,123)

kurn_171, range=72 (-83,-200,123)

kurn_173, range=85 (-55,-201,88)

kurn_181, range=38 (-71,-277,4)

kurn_276925, range=76 (-50,-219,134)

greater_skeleton (90%)
undead_crusader (10%)

kurn_276926, range=95 (-28,-218,134)

greater_scalebone (90%)
undead_crusader (10%)