NPCs composing that spawngroup :

Burynai_excavator (34%)

Burynai_sapper (33%)

lesser_icebone_skeleton (33%)

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

kurn_1, range=57 (-121,-186,6)

greater_skeleton (100%)
greater_skeleton (100%)

kurn_5, range=64 (-29,-107,106)

greater_scalebone (100%)

kurn_19, range=75 (-143,-130,-117)

kurn_20, range=66 (-138,-151,-117)

kurn_27, range=93 (-149,-208,-23)

kurn_29, range=57 (-65,-212,3)

kurn_42, range=75 (1,-174,-109)

kurn_63, range=67 (-24,-109,-105)

Burynai_excavator (100%)

kurn_69, range=75 (-7,-117,-105)

kurn_71, range=85 (-41,-75,-107)

kurn_73, range=85 (-108,-233,-23)

kurn_80, range=53 (-72,-208,-23)

kurn_90, range=82 (-75,-73,-30)

kurn_96, range=97 (11,-104,-40)

Burynai_Excavator (50%)
greater_skeleton (50%)

kurn_113, range=77 (-87,-231,-22)

Burynai_burrower (50%)
Burynai_excavator (50%)

kurn_117, range=81 (-31,-85,-30)

Burynai_Excavator (50%)
Burynai_Excavator (50%)

kurn_138, range=59 (-50,-210,-23)

kurn_139, range=37 (-41,-176,-23)

kurn_140, range=16 (-56,-151,-23)

Burynai_burrower (100%)

kurn_141, range=78 (1,-128,-23)

Burynai_excavator (50%)
Burynai_Excavator (50%)

kurn_142, range=74 (-20,-208,-23)

Burynai_burrower (50%)
greater_scalebone (50%)

kurn_143, range=50 (-27,-177,-23)

kurn_157, range=83 (11,-157,-109)

kurn_161, range=97 (0,-221,90)

greater_scalebone (90%)
undead_crusader (10%)

kurn_162, range=41 (-48,-121,132)

kurn_163, range=88 (-10,-218,132)

kurn_164, range=77 (-83,-232,123)

kurn_166, range=95 (23,-161,132)

kurn_167, range=74 (-6,-121,132)

kurn_168, range=72 (0,-160,132)

kurn_171, range=46 (-83,-200,123)

kurn_172, range=17 (-89,-159,88)

kurn_173, range=49 (-55,-201,88)

kurn_183, range=91 (-62,-65,129)

greater_skeleton (100%)

kurn_276925, range=67 (-50,-219,134)

greater_skeleton (90%)
undead_crusader (10%)

kurn_276926, range=76 (-28,-218,134)

greater_scalebone (90%)
undead_crusader (10%)