NPCs composing that spawngroup :

a_sepulcher_skeleton (50%)

greater_plaguebone (50%)

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

charasis_87, range=162 (26,243,-194)

a_sepulcher_skeleton (100%)

charasis_98, range=190 (-284,120,5)

a_helot_spectre (100%)

charasis_103, range=149 (-273,182,4)

charasis_113, range=163 (-55,99,-194)

greater_plaguebone (100%)

charasis_118, range=156 (-12,147,22)

charasis_121, range=175 (12,147,22)

charasis_131, range=132 (-263,280,22)

charasis_132, range=100 (-221,296,23)

charasis_133, range=188 (-156,429,22)

charasis_134, range=187 (-132,429,22)

charasis_135, range=118 (-243,294,22)

charasis_136, range=65 (-72,234,23)

a_bottomless_feaster (100%)

charasis_137, range=85 (-221,246,23)

charasis_138, range=53 (-189,243,22)

charasis_139, range=55 (-188,222,22)

charasis_142, range=65 (-72,234,22)

a_sepulcher_skeleton (100%)

charasis_143, range=181 (-144,423,22)

a_sepulcher_skeleton (100%)

charasis_146, range=151 (-6,320,22)

charasis_147, range=185 (12,353,22)

charasis_148, range=149 (9,273,21)

a_bile_golem (100%)

charasis_149, range=116 (-20,257,22)

charasis_152, range=196 (60,224,21)

charasis_155, range=24 (-154,224,-139)

charasis_157, range=178 (25,165,-194)

a_pyre_golem (50%)
a_pyre_golem (50%)

charasis_158, range=135 (-25,165,-194)

a_pyre_golem (50%)
a_pyre_golem (50%)

charasis_165, range=127 (-226,152,4)

a_crypt_spectre_189514, range=138 (-237,147,5)