NPCs composing that spawngroup :

a_coldspine_seahorse (100%)

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

sirens_3, range=58 (-404,-369,-176)

a_coldspine_seahorse (50%)
a_neriad_maiden (50%)

sirens_54, range=92 (-547,-329,-52)

a_siren_enticer (50%)
a_siren_enticer (50%)

sirens_56, range=31 (-477,-317,-46)

a_siren_enticer (50%)
a_siren_priestess (50%)

sirens_59, range=97 (-493,-250,-51)

sirens_146, range=77 (-521,-300,-52)

#High_Priestess_Sercema (100%)

#Helsia_Mindreaver_190202, range=75 (-522,-306,-52)

#Helsia_Mindreaver (100%)

sirens_231256, range=59 (-403,-368,-176)

a_servant_swordfish (100%)
a_servant_swordfish (100%)

sirens_231274, range=98 (-492,-249,-51)

a_watery_servant (100%)

sirens_231278, range=90 (-515,-272,-52)

a_siren_seductress (100%)
a_siren_seductress (100%)

sirens_231668, range=75 (-522,-306,51)

#Helsia_Mindreaver (10%)
a_siren_seductress (90%)