NPCs composing that spawngroup :

an_iksar_spectre (50%)

a_tome_keeper (50%)

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

kaesora_10, range=81 (93,-440,-101)

skeletal_minion (100%)

kaesora_11, range=49 (92,-394,-99)

guardian_of_Xalgoz (50%)
skeletal_minion (50%)

kaesora_26, range=37 (136,-409,-98)

failed_crypt_raider (10%)
spectral_guardian (90%)

kaesora_32, range=179 (215,-210,-113)

kaesora_34, range=171 (120,-200,-29)

kaesora_37, range=108 (210,-450,-109)

skeletal_warder (100%)

kaesora_43, range=76 (167,-441,-101)

skeletal_warder (100%)

kaesora_51, range=127 (9,-356,-101)

skeletal_warder (100%)

kaesora_52, range=173 (40,-516,-107)

kaesora_53, range=160 (63,-514,-109)

kaesora_54, range=168 (46,-514,-106)

kaesora_55, range=150 (51,-495,-109)

kaesora_65, range=82 (57,-395,-68)

spectral_guardian (100%)

kaesora_66, range=32 (134,-404,-99)

spectral_guardian (100%)

kaesora_67, range=140 (258,-302,-108)

kaesora_68, range=110 (219,-298,-108)

kaesora_69, range=73 (179,-312,-109)

skeletal_warder (50%)
skeletal_warder (50%)

kaesora_70, range=115 (246,-336,-108)

minion_of_Xalgoz (100%)

kaesora_71, range=130 (263,-341,-106)

kaesora_72, range=94 (176,-285,-109)

minion_of_Xalgoz (50%)
skeletal_minion (50%)

kaesora_73, range=73 (150,-299,-109)

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

kaesora_93, range=30 (115,-395,-98)

spectral_guardian (80%)
tortured_librarian (20%)

kaesora_94, range=47 (116,-415,-99)

spectral_guardian (80%)
spectral_librarian (20%)