NPCs composing that spawngroup :

a_siren_beguiler (34%)

a_siren_myrmidon (33%)

a_siren_templar (33%)

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

sirens_27, range=88 (36,-1,-80)

a_siren_myrmidon (50%)
a_siren_myrmidon (50%)

sirens_37, range=71 (24,11,-135)

sirens_47, range=63 (19,20,-20)

a_coldspine_seahorse (50%)
a_swordfish (50%)

sirens_72, range=84 (-51,-30,-133)

sirens_125, range=82 (44,27,-54)

sirens_127, range=80 (45,36,-80)

sirens_128, range=39 (4,62,-135)

sirens_130, range=22 (-43,32,-117)

a_siren_myrmidon (50%)
a_siren_templar (50%)

sirens_131, range=50 (-54,7,-110)

a_siren_beguiler (50%)
a_siren_templar (50%)

sirens_132, range=75 (-64,-16,-104)

a_servant_swordfish_190209, range=93 (53,20,-16)

a_swordfish (100%)

sirens_231256, range=47 (-19,8,-13)

a_servant_swordfish (100%)
a_servant_swordfish (100%)

sirens_231263, range=51 (17,46,3)

sirens_231274, range=83 (-50,-29,-133)

a_watery_servant (100%)

sirens_231277, range=80 (45,36,-80)

sirens_231278, range=39 (4,62,-135)

a_siren_seductress (100%)