NPCs composing that spawngroup :

a_sepulcher_skeleton (100%)

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

charasis_11, range=190 (-99,-388,5)

a_helot_spectre (100%)

charasis_12, range=70 (12,-294,22)

elementalbone_skeleton (50%)
hexbone_skeleton (50%)

charasis_20, range=183 (28,-405,22)

charasis_21, range=180 (7,-404,22)

charasis_22, range=52 (6,-276,23)

charasis_23, range=95 (79,-276,22)

charasis_24, range=158 (139,-299,21)

charasis_25, range=95 (85,-183,22)

charasis_26, range=87 (86,-217,23)

charasis_27, range=78 (12,-147,22)

a_pyre_golem (50%)
a_pyre_golem (50%)

charasis_29, range=77 (-12,-147,22)

charasis_30, range=113 (-1,-111,21)

a_pulsating_bile (50%)
hexbone_skeleton (50%)

charasis_31, range=75 (52,-170,23)

charasis_32, range=53 (52,-225,22)

charasis_33, range=31 (-28,-207,22)

charasis_61, range=199 (-182,-140,22)

charasis_92, range=154 (-82,-355,4)

charasis_110, range=196 (-17,-29,-158)

an_undead_oblation (100%)

charasis_173, range=83 (63,-278,-176)

charasis_174, range=71 (45,-279,-194)

greater_war_boned_skeleton (100%)

charasis_175, range=46 (25,-185,-194)

charasis_176, range=45 (-25,-185,-194)

charasis_177, range=32 (31,-225,-194)

a_sepulcher_skeleton (100%)

charasis_179, range=189 (-191,-207,-157)

a_bottomless_feaster (100%)

charasis_197, range=177 (-83,-381,4)

charasis_198, range=194 (-115,-381,5)

charasis_199, range=175 (-116,-357,5)

charasis_204, range=124 (14,-348,22)

hexbone_skeleton (100%)

charasis_209, range=117 (116,-224,23)

a_helot_spectre (100%)