Lethe

Preferred IV: +ATK or +SPD / -HP

Lethe will appreciate the boost in offensive power that she will acquire from either an Attack or Speed Asset. While Asset is a preferable option, both will be excellent choices through either increased damage or increased follow-up potential. HP is the recommended Flaw, but a Flaw in Defense and Resistance can still work.

Weapon: Brazen Cat Fang

• Regardless of whether she is transformed or not, Brazen Cat Fang will give Lethe the Atk/Spd Solo skill, increasing her offensive capabilities whenever she has no adjacent allies.

• The cavalry beast transformation bonuses are amazing for this set. Reducing the opponent’s Atk and Def will help Lethe to deal more damage, take less damage, and activate Heavy Blade with greater frequency all in one. The denial of follow-ups also helps to keep her safe if she cannot finish off her target.

Assist: Reposition / Player Preference

Special: Galeforce

• Galeforce allows the user to act again after combat once per turn. This is a powerful effect that comes at the cost of a lengthy cooldown of five.

• Lethe is very capable of making use of this Special. However, she will need both Heavy Blade to activate and at least one attack from the opponent in order to fully charge it in a single round of combat.

Passive A: Atk/Spd Solo / Swift Sparrow / Fury / Life and Death / Spd/Def Solo

• Atk/Spd Solo is Lethe’s optimal A slot choice, granting her with a large offensive boost whenever she has no adjacent allies.

• Swift Sparrow is a cheaper alternative option, granting a lesser boost than Atk/Spd Solo but only needing Lethe to initiate combat.

• Life and Death is a strong option, particularly for Aether Raids. The lower defenses do put her more at risk of being OHKO, but can also work as an effective method of getting her to low enough HP for allies to use Wings of Mercy. This is a common strategy with Galeforce users in Aether Raids.

• Fury is a cheap option that boosts Lethe’s overall combat capabilities at the cost of recoil damage after combat. This recoil damage can also be utilized to help her reach the range for allies to use Wings of Mercy, similar to what is mentioned above.

• Her default Spd/Def Solo is a great budget choice, granting her with both Speed and Defense whenever she has no adjacent allies.

Passive B: Chill Passives / Lunge / Hit and Run 

• Any Chill skill besides Chill Res will work very well with this set. Against anyone affected, Chill Spd helps Lethe to perform follow-ups, Chill Def helps Lethe to deal more damage, and Chill Atk helps Lethe to take less damage while also increasing her ability to activate Heavy Blade.

• Lunge and Hit and Run are both also good budget choices. Lunge swaps the position of Lethe and her target after combat (this happens even if Lethe defeats her foe) while Hit and Run moves her back one space after combat.

Passive C: Smoke Passives / Savage Blow / Beast Buff / Player Preference

• Any Smoke skill besides Res Smoke will work well in the C slot. Any of these skills will debuff opponents around Lethe’s target for their specific stats. Atk Smoke, in particular, is a strong choice as not only is it cheap to inherit but it also helps Lethe to activate Heavy Blade and helps to keep her safe on Enemy Phase.

• Savage Blow is also an effective choice, dealing a small amount of damage to any enemy around her target.

• If she is on a team with other beasts, then she can take a Beast buff. She comes naturally with Hone Beasts, making it the optimal choice of a Beast buff.

Sacred Seal: Heavy Blade

• Heavy Blade is mandatory for this set to function properly. This Sacred Seal will allow Lethe to fully charge Galeforce in a single round of combat.

• Note that this both requires Heavy Blade to activate and for the opponent to retaliate once, so it won’t allow Lethe to fully charge Galeforce against foes that cannot retaliate on her unless Galeforce already has some charge from another source, such as Ostia’s Pulse.

Preferred IV: +ATK or +SPD / -HP

Once again, Lethe will most benefit from using her Asset to increase her offensive potential. Attack is good for increasing her raw damage and ability to activate Heavy Blade while Speed is good for increasing her ability to perform follow-up attacks. HP is the overall best Flaw, but a Flaw in Defense or Resistance will still be workable.

Weapon: Brazen Cat Fang

Assist: Reposition / Player Preference

Special: Moonbow / Luna

• Moonbow is an excellent choice for this build thanks to its consistency. With Heavy Blade, Moonbow can activate every round of combat even without enemy retaliation thanks to its low cooldown of two.

• Luna is also a strong choice. While it is more powerful than Moonbow, its cooldown of three means it requires both Heavy Blade and an enemy retaliation to fully charge in a single round of combat.

Passive A: Atk/Spd Solo / Def/Spd Solo / Swift Sparrow / Fury / Life and Death

• Atk/Spd Solo is Lethe’s best option in the A slot. This skill grants a substantial boost to her offensive capabilities whenever she has no adjacent allies.

• Def/Spd Solo is also a good option, granting Lethe with a large boost to Speed and Defense whenever she has no adjacent allies.

• Swift Sparrow is another option to consider, granting a lesser offensive boost than Atk/Spd Solo whenever initiating combat. The notable benefit to Swift Sparrow over Atk/Spd Solo is that it’s much cheaper to inherit.

• Fury is cheap to inherit and another good option. It will grant Lethe a strong all-around boost to her combat potential and the recoil damage can potentially help Lethe to more easily reach the HP threshold for Desperation.

• Life and Death is another cheap option that gives a substantial offensive boost at the cost of defensive capabilities. This can help Lethe with reaching Desperation through the reduced defenses, but do also be careful as this makes her more at risk of being OHKO.

Passive B: Desperation / Chill Passives

• Desperation is a strong B slot choice for this build. Whenever Lethe is under 75% HP, Desperation will allow her to make any follow-up attack immediately after her first. This will be useful to help her avoid attacks from opponents that could potentially OHKO her.

• Any Chill skill besides Chill Res will also make for an effective choice, helping Lethe in combat against anyone affected by the debuff.

Passive C: Even Atk Wave / Even Spd Wave / Beast Buff / Player Preference

• A Wave skill such as Even Atk Wave or Even Spd Wave will allow Lethe to buff herself every other turn without relying on her allies. This can be useful as Lethe can often be away from her team in order to attack. However, if one can confidently provide her with buffs, a Wave skill will not be necessary.

• If she’s alongside other beasts, a Beast buff will be a great choice. She comes naturally with Hone Beasts which she can use to help any beast allies in their offensive capabilities.

Sacred Seal: Heavy Blade / Brazen Atk/Def / Atk/Spd 2

• Heavy Blade is a fantastic choice of Sacred Seal for Lethe. The extra Special charge gained from her attacks when she has more Attack than her foe allows her to activate Moonbow and Luna with greater frequency, potentially every round of combat in the case of Moonbow.

• Brazen skills also work really well in the Sacred Seal slot. Brazens naturally pair fantastically with Desperation due to Brazen being active whenever Desperation is. Brazen Atk/Def in particular grants Lethe with a huge Attack and Defense boost whenever below 80% HP.

• The simple Atk/Spd 2 can also work well to give Lethe a small but notable offensive boost.