NPCs composing that spawngroup :

hexbone_skeleton (100%)

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

charasis_7, range=150 (117,-458,40)

an_undertaker_skeleton (50%)
a_hamal_skeleton (50%)

charasis_8, range=165 (152,-440,25)

charasis_9, range=151 (146,-422,24)

charasis_10, range=148 (152,-404,24)

charasis_11, range=119 (-99,-388,5)

a_helot_spectre (100%)

charasis_12, range=54 (12,-294,22)

elementalbone_skeleton (50%)
hexbone_skeleton (50%)

charasis_14, range=126 (101,-440,22)

charasis_15, range=103 (101,-404,23)

charasis_16, range=195 (27,-543,23)

a_helot_spectre (100%)

charasis_17, range=172 (26,-520,23)

a_helot_spectre (50%)
hexbone_skeleton (50%)

charasis_19, range=111 (-43,-444,22)

charasis_20, range=58 (28,-405,22)

charasis_21, range=56 (7,-404,22)

charasis_22, range=72 (6,-276,23)

charasis_23, range=97 (79,-276,22)

charasis_24, range=134 (139,-299,21)

charasis_25, range=179 (85,-183,22)

charasis_26, range=149 (86,-217,23)

charasis_31, range=182 (52,-170,23)

charasis_32, range=128 (52,-225,22)

charasis_33, range=147 (-28,-207,22)

charasis_92, range=96 (-82,-355,4)

charasis_112, range=125 (-1,-224,-194)

a_sepulcher_skeleton (100%)

charasis_173, range=86 (63,-278,-176)

charasis_174, range=76 (45,-279,-194)

greater_war_boned_skeleton (100%)

charasis_175, range=163 (25,-185,-194)

charasis_176, range=167 (-25,-185,-194)

charasis_177, range=124 (31,-225,-194)

a_sepulcher_skeleton (100%)

charasis_194, range=195 (80,-532,22)

charasis_195, range=191 (63,-533,22)

charasis_196, range=136 (-45,-471,22)

charasis_197, range=102 (-83,-381,4)

charasis_198, range=133 (-115,-381,5)

charasis_199, range=130 (-116,-357,5)

charasis_203, range=86 (-28,-424,21)

a_pulsating_bile (100%)

charasis_209, range=160 (116,-224,23)

a_helot_spectre (100%)