Primary God
Zeus
Starting out, aim to take
Heaven Flourish as your starting boon. High rarity is preferred, but Heaven Flourish scales well with Poms later in the run even if you get a Common. Static Shock, Double Strike, and Electric Overload for increased Blitz and chain-lightning damage will be your next Zeus Boon priorities.
God Pool
Aphrodite
Aphrodite is another highly desired God. First off, her Attack Boon is the highest damage percentage increase and will always be active since you can only Attack "Nearby Foes." Additionally, she opens up the opportunity for
Romantic Spark. Save rerolls for after you have the requirements and use them looking for their Duo because the 80% increase to Blitz damage is wild!
Romantic Spark works great with Mel Blades because you are always positioned close enough to Dash through the enemies. Therefore, always look to get Aphrodite in your God pool. The damage reduction from Weak also helps manage the dangerous proximity of the Sister Blade's Attack.
Zeus and Aphrodite have a lot of Air Element Boons, and they each have a powerful Air Element Infusion Boon(
Air Quality &
Wispy Wiles) . Look to add both to your build whenever possible!
On top of all of this,
Rapture Ring is the final key in making this build feel OP. Even if you don't get the targeted Hammers, pulling enemies into the center of your Cast allows you to apply Blitz to everyone ensnared with a single Special.
Ares
The rapid attacks of
Aspect of Melinoë make
Ares a good addition to your God pool.
Blood Spree will quickly heal you back up to fighting health and help preserve precious Death Defiances, or keep you alive long enough to win.
Mutual Destruction is always good to have, especially paired with
Blood Spree since you'll be sitting at low health for a good amount of time.
Grab
Stabbing Rush if you see it, as you'll be dashing around the enemies a lot and it will add some extra damage.
Hephaestus
Lastly,
Hephaestus rounds off this build with his defensive boons and Duo with Zeus.
Tough Gain is the best Magick Boon for this Sister Blades Build because we don't need much Magick and want the damage reduction. Moreover, Tough Gain fulfills the requirement with
Static Shock for
Master Conductor, which comes in clutch in boss fights because it enables chain-lighting to bounce of yourself for increased damage.
Poms
100% you are hoping to hit
Heaven Flourish with every Pom. Secondary choices would be
Flutter Strike or
Double Strike. If you get
Air Quality, you won't gain anything from pomming low damage Boons like Static Shock, Rapture Ring, or Stabbing Rush.