To beat the Scylla and the Sirens in Hade 2, you will need to focus your attacks on foe at a time. If you follow these steps, you should be able to defeat them in the next 10 minutes. Honestly, Make sure have a good attacking gods blessing and if possible a distant attack at the start, as you will be mostly moving the entire battle.
Watch Strategy in Action: How to Beat Scylla and the Sirens – Boss Battle – Hades 2
Defeating the Sirens
Defeating The Roxy the Drummer Siren
First, you will need to beat Roxy the drummer siren. she is the only stationary attacker. This allows you to guide the Jetty and Scylla to the far end off the board and jet back and do as much damage before she goes on the offensive. Her main 2 attacks are a full board attack. her first one is set a damage area around herself, then she does an attack that damages the entire board. Staying right outside the attack zone, allows you to rush in a pummel her.
Battling Jetty the Guitar Siren
Next up is to defeat Jetty the Guitar Siren. She is always moving and the closet to you all game. In this round, she is the featured artist (featured artist can be any of the 3 so don’t change the attack order) Her main attacks are shooting forward ring attack, and a bouncing red sphere attack that are balls that shoot bounce out and can hit you at distance. Basic is to attack right after she stops. then run away to the same patterns.
Beating Scylla the singing Siren
Finally you should defeat Scylla the singing siren. Being the most offensive and defensive siren, she is best saved for last. That does not mean you should throw attacks at her as the game progresses. any siren attacked takes damage off the full health gauge. Her primary attacks include a wide board attack that will attack circles across attack lines from one site of the field to the next. Another is circular spin that attacks you with 4 laser lines (you should not be near this). She Has a jet that shoots out in front of her as she moves forward and usually only attacks that way when very close to you. She also has a ball attack that shoots balls in front of her and can do some damage. once she takes too much damage, she will either hide in her shell or put up a force field. Its just a waiting game and easier when its just her to beat. Oh, her final ace attack when it is just her is she summons razorfish in drones to attack you, so hurry up at that point and finish her.
Battle Hints
Favorite in game Attack Blessing (enhanced attacks from Hephaestus (400 damage)), Zeus cloud damage.
Keep moving. This is like all these battles a move or die attack stage.