NPCs composing that spawngroup :

a_siren_enchantress (33%)

a_siren_enchantress (34%)

a_siren_enticer (33%)

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

sirens_42, range=59 (-627,-213,-111)

a_swordfish (100%)

sirens_50, range=23 (-586,-279,-28)

sirens_52, range=40 (-585,-216,-52)

sirens_53, range=50 (-538,-246,-52)

a_siren_enticer (50%)
a_siren_enticer (50%)

sirens_54, range=83 (-547,-329,-52)

a_siren_enticer (50%)
a_siren_enticer (50%)

sirens_55, range=66 (-555,-314,-42)

a_siren_enticer (50%)
a_siren_priestess (50%)

sirens_58, range=70 (-522,-229,-52)

sirens_59, range=94 (-493,-250,-51)

sirens_78, range=74 (-577,-182,-114)

sirens_146, range=79 (-521,-300,-52)

#High_Priestess_Sercema (100%)

#Helsia_Mindreaver_190202, range=82 (-522,-306,-52)

#Helsia_Mindreaver (100%)

sirens_231269, range=75 (-576,-181,-117)

a_coldspine_seahorse (99%)
Fellspine (1%)

sirens_231274, range=95 (-492,-249,-51)

a_watery_servant (100%)
a_watery_servant (100%)

sirens_231275, range=41 (-584,-215,-52)

an_icy_servant (100%)

sirens_231277, range=22 (-585,-278,-28)

sirens_231278, range=73 (-515,-272,-52)

a_siren_seductress (100%)

sirens_231281, range=70 (-522,-229,-52)

sirens_231668, range=82 (-522,-306,51)

#Helsia_Mindreaver (10%)
a_siren_seductress (90%)