NPCs composing that spawngroup :

#Mistress_Latazura (100%)

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

sirens_48, range=43 (-640,-695,-152)

sirens_97, range=68 (-691,-695,-46)

sirens_98, range=30 (-668,-732,-58)

sirens_99, range=71 (-581,-695,-46)

sirens_100, range=28 (-610,-733,-58)

sirens_101, range=92 (-594,-657,-68)

sirens_102, range=37 (-639,-701,-58)

sirens_103, range=77 (-663,-665,-60)

a_siren_enchantress (50%)
a_siren_enticer (50%)

sirens_104, range=76 (-614,-665,-60)

sirens_105, range=96 (-661,-644,-62)

sirens_106, range=97 (-616,-643,-62)

sirens_118, range=5 (-640,-743,-164)

an_enthralled_bulthar (50%)
an_enthralled_bulthar (50%)

sirens_142, range=93 (-682,-656,-68)

sirens_143, range=90 (-727,-753,-68)

a_siren_enchantress (50%)
a_siren_priestess (50%)

sirens_144, range=90 (-549,-754,-68)

sirens_145, range=0 (-638,-738,-25)

#Mistress_Latazura (100%)

sirens_231229, range=57 (-649,-682,-60)

sirens_231274, range=98 (-615,-642,-62)

a_watery_servant (100%)
a_watery_servant (100%)

sirens_231275, range=97 (-660,-643,-61)

an_icy_servant (100%)
an_icy_servant (100%)

sirens_231277, range=74 (-644,-664,-60)

sirens_231286, range=76 (-614,-665,-60)