NPCs composing that spawngroup :

a_sepulcher_skeleton (100%)

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

charasis_12, range=71 (12,-294,22)

elementalbone_skeleton (50%)
hexbone_skeleton (50%)

charasis_15, range=192 (101,-404,23)

charasis_20, range=180 (28,-405,22)

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

charasis_22, range=56 (6,-276,23)

charasis_23, range=70 (79,-276,22)

charasis_24, range=130 (139,-299,21)

charasis_25, range=68 (85,-183,22)

charasis_26, range=55 (86,-217,23)

charasis_27, range=80 (12,-147,22)

a_pyre_golem (50%)
a_pyre_golem (50%)

charasis_29, range=89 (-12,-147,22)

charasis_30, range=118 (-1,-111,21)

a_pulsating_bile (50%)
hexbone_skeleton (50%)

charasis_31, range=58 (52,-170,23)

charasis_32, range=21 (52,-225,22)

charasis_33, range=61 (-28,-207,22)

charasis_92, range=172 (-82,-355,4)

charasis_112, range=31 (-1,-224,-194)

a_sepulcher_skeleton (100%)

charasis_173, range=61 (63,-278,-176)

charasis_174, range=55 (45,-279,-194)

greater_war_boned_skeleton (100%)

charasis_175, range=40 (25,-185,-194)

charasis_176, range=68 (-25,-185,-194)

charasis_197, range=193 (-83,-381,4)

charasis_199, range=197 (-116,-357,5)

charasis_204, range=123 (14,-348,22)

hexbone_skeleton (100%)

charasis_209, range=85 (116,-224,23)

a_helot_spectre (100%)

charasis_Acolyte_of_Convergence000_1949931, range=196 (46,-29,4)

Acolyte_of_Convergence (100%)