NPCs composing that spawngroup :

Acolyte_of_Convergence (100%)

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

charasis_25, range=158 (85,-183,22)

charasis_26, range=192 (86,-217,23)

charasis_27, range=122 (12,-147,22)

a_pyre_golem (50%)
a_pyre_golem (50%)

charasis_29, range=131 (-12,-147,22)

charasis_30, range=93 (-1,-111,21)

a_pulsating_bile (50%)
hexbone_skeleton (50%)

charasis_31, range=141 (52,-170,23)

charasis_32, range=196 (52,-225,22)

charasis_33, range=192 (-28,-207,22)

charasis_110, range=62 (-17,-29,-158)

an_undead_oblation (100%)

charasis_111, range=142 (-96,-42,-189)

greater_war_boned_skeleton (100%)

charasis_113, range=163 (-55,99,-194)

greater_plaguebone (100%)

charasis_118, range=185 (-12,147,22)

charasis_121, range=179 (12,147,22)

charasis_157, range=195 (25,165,-194)

a_pyre_golem (50%)
a_pyre_golem (50%)

charasis_159, range=130 (-2,92,-188)

a_bottomless_gnawer (50%)
greater_war_boned_skeleton (50%)

charasis_175, range=157 (25,-185,-194)

charasis_176, range=171 (-25,-185,-194)

charasis_177, range=196 (31,-225,-194)

a_sepulcher_skeleton (100%)