NPCs composing that spawngroup :

an_enthralled_molkor (50%)

a_watery_servant (50%)

NPCs spawning around that spawngroup :
(Max range : 100)

sirens_13, range=83 (-686,-167,-153)

an_enthralled_bulthar (50%)
an_enthralled_bulthar (50%)

sirens_64, range=64 (-694,-147,-149)

sirens_83, range=1 (-749,-112,-177)

sirens_86, range=73 (-821,-109,-177)

sirens_87, range=51 (-748,-162,-179)

sirens_93, range=75 (-799,-167,-153)

an_enthralled_bulthar (80%)

sirens_94, range=49 (-722,-69,-177)

sirens_118, range=59 (-724,-165,-153)

an_enthralled_bulthar (50%)
an_enthralled_bulthar (50%)

sirens_an_enthralled_bulthar6_takp_import_v0, range=99 (-830,-167,-153)

an_enthralled_bulthar (100%)

sirens_223833_takp_import_v0, range=50 (-747,-161,-179)

sirens_223848_takp_import_v0, range=72 (-820,-108,-177)

an_icy_servant (50%)
a_servant_swordfish (50%)

sirens_223868_takp_import_v0, range=50 (-721,-68,-178)

sirens_223843_takp_import_v0, range=65 (-693,-146,-149)

an_enthralled_molkor (50%)
an_enthralled_ulthork (50%)

sirens_an_enthralled_ulthork16_takp_import_v0, range=58 (-723,-164,-153)

an_enthralled_ulthork (100%)

sirens_223837_takp_import_v0, range=83 (-685,-166,-153)

an_enthralled_bulthar (80%)