NPCs composing that spawngroup :

spectral_guardian (80%)

tortured_librarian (20%)

NPCs spawning around that spawngroup :
(Max range : 200)

kaesora_10, range=49 (93,-440,-101)

skeletal_minion (100%)

kaesora_11, range=22 (92,-394,-99)

guardian_of_Xalgoz (50%)
skeletal_minion (50%)

kaesora_26, range=25 (136,-409,-98)

failed_crypt_raider (10%)
spectral_guardian (90%)

kaesora_34, range=195 (120,-200,-29)

kaesora_37, range=194 (178,-579,-109)

skeletal_warder (100%)
skeletal_warder (100%)

kaesora_43, range=69 (167,-441,-101)

skeletal_warder (100%)

kaesora_51, range=112 (9,-356,-101)

skeletal_warder (100%)

kaesora_52, range=142 (40,-516,-107)

kaesora_53, range=129 (63,-514,-109)

kaesora_54, range=137 (46,-514,-106)

kaesora_55, range=118 (51,-495,-109)

kaesora_65, range=58 (57,-395,-68)

spectral_guardian (100%)

kaesora_66, range=21 (134,-404,-99)

spectral_guardian (100%)

kaesora_67, range=170 (258,-302,-108)

kaesora_68, range=142 (219,-298,-108)

kaesora_69, range=105 (179,-312,-109)

skeletal_warder (50%)
skeletal_warder (50%)

kaesora_70, range=144 (246,-336,-108)

minion_of_Xalgoz (100%)

kaesora_71, range=157 (263,-341,-106)

kaesora_72, range=125 (176,-285,-109)

minion_of_Xalgoz (50%)
skeletal_minion (50%)

kaesora_73, range=102 (150,-299,-109)

kaesora_74, range=31 (136,-371,-73)

an_iksar_spectre (50%)
a_tome_keeper (50%)

kaesora_87, range=92 (57,-323,-109)

kaesora_94, range=19 (116,-415,-99)

spectral_guardian (80%)
spectral_librarian (20%)