NPCs composing that spawngroup :

a_sepulcher_skeleton (25%)

a_sepulcher_spectre (25%)

a_sepulcher_spectre (25%)

greater_war_boned_skeleton (25%)

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

charasis_87, range=110 (26,243,-194)

a_sepulcher_skeleton (100%)

charasis_114, range=105 (-42,444,22)

charasis_116, range=178 (7,531,22)

charasis_121, range=157 (79,211,22)

charasis_123, range=196 (3,549,21)

a_bile_golem (50%)
a_bile_golem (50%)

charasis_124, range=106 (-62,429,21)

a_bile_golem (50%)
a_sepulcher_skeleton (50%)

charasis_125, range=144 (-64,476,22)

a_bottomless_feaster (50%)
greater_war_boned_skeleton (50%)

charasis_133, range=184 (-156,429,22)

charasis_134, range=162 (-132,429,22)

charasis_136, range=144 (-72,234,23)

a_bottomless_feaster (100%)

charasis_140, range=172 (131,228,23)

charasis_141, range=152 (143,275,23)

a_bottomless_feaster (100%)

charasis_142, range=144 (-72,234,22)

a_sepulcher_skeleton (100%)

charasis_143, range=170 (-144,423,22)

a_sepulcher_skeleton (100%)

charasis_145, range=181 (79,184,22)

charasis_146, range=37 (-6,320,22)

charasis_148, range=79 (9,273,21)

a_bile_golem (100%)

charasis_149, range=101 (-20,257,22)

charasis_150, range=162 (157,279,22)

charasis_151, range=186 (61,173,22)

charasis_152, range=137 (60,224,21)

charasis_156, range=184 (-136,242,-162)

a_sepulcher_skeleton (50%)
greater_plaguebone (50%)

charasis_157, range=188 (25,165,-194)

a_pyre_golem (50%)
a_pyre_golem (50%)

charasis_158, range=191 (-25,165,-194)

a_pyre_golem (50%)
a_pyre_golem (50%)