NPCs composing that spawngroup :

a_siren_enchantress (33%)

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

sirens_6, range=96 (-566,-647,-152)

sirens_48, range=48 (-640,-695,-152)

sirens_85, range=83 (-566,-662,-47)

sirens_97, range=89 (-691,-695,-46)

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

sirens_99, range=47 (-581,-695,-46)

sirens_101, range=77 (-594,-657,-68)

sirens_102, range=43 (-639,-701,-58)

sirens_103, range=86 (-663,-665,-60)

sirens_104, range=68 (-614,-665,-60)

sirens_106, range=90 (-616,-643,-62)

sirens_118, range=31 (-640,-743,-164)

sirens_144, range=64 (-549,-754,-68)

sirens_145, range=28 (-638,-738,-25)

sirens_231229, range=84 (-565,-661,-47)

sirens_231274, range=91 (-615,-642,-62)

sirens_231275, range=78 (-593,-656,-68)

sirens_231277, range=76 (-644,-664,-60)

sirens_231286, range=68 (-614,-665,-60)