NPCs composing that spawngroup :

a_sepulcher_skeleton (100%)

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

charasis_87, range=99 (26,243,-194)

a_sepulcher_skeleton (100%)

charasis_113, range=135 (-55,99,-194)

greater_plaguebone (100%)

charasis_118, range=105 (-12,147,22)

charasis_121, range=120 (12,147,22)

charasis_124, range=196 (-62,429,21)

a_bile_golem (50%)
a_sepulcher_skeleton (50%)

charasis_131, range=196 (-263,280,22)

charasis_132, range=161 (-221,296,23)

charasis_135, range=181 (-243,294,22)

charasis_136, range=1 (-72,234,23)

a_bottomless_feaster (100%)

charasis_137, range=149 (-221,246,23)

charasis_138, range=117 (-189,243,22)

charasis_139, range=116 (-188,222,22)

charasis_145, range=159 (79,184,22)

charasis_146, range=108 (-6,320,22)

charasis_147, range=145 (12,353,22)

charasis_148, range=90 (9,273,21)

a_bile_golem (100%)

charasis_149, range=56 (-20,257,22)

charasis_151, range=146 (61,173,22)

charasis_152, range=132 (60,224,21)

charasis_155, range=81 (-154,224,-139)

charasis_156, range=63 (-136,242,-162)

a_sepulcher_skeleton (50%)
greater_plaguebone (50%)

charasis_157, range=119 (25,165,-194)

a_pyre_golem (50%)
a_pyre_golem (50%)

charasis_158, range=83 (-25,165,-194)

a_pyre_golem (50%)
a_pyre_golem (50%)

charasis_159, range=157 (-2,92,-188)

a_bottomless_gnawer (50%)
greater_war_boned_skeleton (50%)

charasis_165, range=174 (-226,152,4)

a_crypt_spectre_189514, range=186 (-237,147,5)