NPCs composing that spawngroup :

#Helsia_Mindreaver (100%)

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

sirens_49, range=82 (-587,-256,-28)

sirens_50, range=69 (-586,-279,-28)

sirens_53, range=62 (-538,-246,-52)

a_siren_enticer (50%)
a_siren_enticer (50%)

sirens_54, range=33 (-547,-329,-52)

a_siren_enticer (50%)
a_siren_enticer (50%)

sirens_55, range=33 (-555,-314,-42)

a_siren_enticer (50%)
a_siren_priestess (50%)

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

a_siren_enticer (50%)
a_siren_priestess (50%)

sirens_58, range=77 (-522,-229,-52)

sirens_59, range=63 (-493,-250,-51)

sirens_84, range=75 (-455,-340,-107)

a_coldspine_seahorse (100%)

sirens_146, range=6 (-521,-300,-52)

#High_Priestess_Sercema (100%)

sirens_231256, range=75 (-454,-339,-107)

a_servant_swordfish (100%)

sirens_231274, range=64 (-492,-249,-51)

a_watery_servant (100%)
a_watery_servant (100%)

sirens_231277, range=68 (-585,-278,-28)

sirens_231278, range=34 (-515,-272,-52)

a_siren_seductress (100%)
a_siren_seductress (100%)

sirens_231281, range=77 (-522,-229,-52)

sirens_231668, range=0 (-522,-306,51)

#Helsia_Mindreaver (10%)
a_siren_seductress (90%)