NPCs composing that spawngroup :

#Tzirathk (30%)

a_black_reaver (70%)

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

citymist_2, range=68 (-2,319,96)

a_black_reaver (100%)

citymist_4, range=40 (16,350,96)

a_black_reaver (100%)
a_black_reaver (100%)

citymist_5, range=27 (20,368,4)

citymist_8, range=11 (-11,387,75)

citymist_9, range=11 (11,387,77)

citymist_11, range=60 (28,440,3)

citymist_12, range=27 (21,405,4)

citymist_13, range=27 (-21,405,4)

citymist_14, range=22 (22,387,4)

citymist_17, range=28 (-22,369,4)

citymist_18, range=20 (-20,387,4)

citymist_21, range=180 (-177,353,-7)

citymist_22, range=119 (-46,277,4)

citymist_23, range=116 (35,276,3)

a_mist_golem (33%)
greater_war_boned_skeleton (33%)

citymist_41, range=197 (195,420,-7)

citymist_63, range=128 (89,295,4)

citymist_112, range=101 (-97,417,5)

citymist_115, range=101 (99,407,4)

a_wraith (25%)
greater_war_boned_skeleton (25%)

citymist_LordGhiosk, range=34 (1,421,6)

a_black_reaver (100%)

citymist_a_black_reaver2_takp_import_v0, range=0 (0,387,94)

citymist_223157_takp_import_v0, range=25 (-25,391,81)

gyrating_goo (100%)

citymist_222986_takp_import_v0, range=10 (-10,387,77)

citymist_222983_takp_import_v0, range=68 (-1,319,96)

a_black_reaver (100%)

citymist_222992_takp_import_v0, range=15 (0,372,94)

a_fog_golem (50%)
a_wraith (25%)
a_wraith (25%)

citymist_222970_takp_import_v0, range=27 (21,369,3)

citymist_222977_takp_import_v0, range=112 (-98,443,5)

citymist_222979_takp_import_v0, range=34 (1,421,6)

a_black_reaver (100%)

citymist_greater_plaguebone12_takp_import_v0, range=22 (22,387,3)

greater_plaguebone (50%)
greater_plaguebone (50%)

citymist_222978_takp_import_v0, range=26 (-20,405,4)

a_fog_golem (50%)
a_fog_golem (50%)
a_phantom (25%)
a_phantom (25%)
a_phantom (25%)
a_phantom (25%)

citymist_222963_takp_import_v0, range=176 (-174,356,-7)