Khadein Byleth (M)

Weapon: Guide’s Hourglass

Assist: Positional Assist / Assistless / Flexible

Special: Sublime Heaven

Passive A: Atk/Spd Finish / Atk/Spd Unity / Atk/Spd Ideal / Swift Sparrow 

Passive B: Seal Res 4 / Seal Spd 4 / Spd Preempt / Null Follow-Up / Lull Skills

Passive C: Time’s Pulse 4 / Atk/Spd Oath 4 / Atk/Spd Menace / Joint Drive Skills / Flexible

Sacred Seal: Blade Session / Null Follow-Up / Atk/Spd Form / Swift Sparrow / Atk/Spd Solo

• Byleth has so many strong offensive tools to work with — a damage reduction-piercing Special with a frequent trigger rate, the ability to ignore Guard and Breath effects, sizeable damage reduction of his own, and immunity to forest tiles — that he can essentially be slapped onto any team and perform very well. This set builds on this quality by mostly focusing on his damage, with considerations to a variety of modes (including Aether Raids Defense). Offensive Assets are naturally recommended. 
• Atk/Spd Finish is a natural complement to Byleth’s frequent Special triggers (as he can even activate Sublime Heaven twice in a round rather consistently), boosting them with padded true damage and healing alongside a stellar +7 Atk/Spd boost. One may also consider Atk/Spd Unity (largely for Aether Raids) to exploit enemy debuffs, with other standard stat-boosting skills like Atk/Spd Ideal and Swift Sparrow also working nicely.
• The biggest choice to make, by and large, lies in Byleth’s B skill, as he has several options that all work well:
  • Seal Res 4 is perhaps the best choice from a pure damage perspective, as it automatically inflicts a staggering -11 Res on his foe without needing any actual setup — with the bonus of granting him Guard every now and then! Seal Spd 4 doesn’t pad his raw damage as much, but ensures his follow-ups become much more consistent and lets him get the most out of his 【Dodge】buff from his Guide’s Hourglass. Lull skills essentially offer weaker benefits of these skills, but are more accessible.
  • For a more mixed-phase approach, Spd Preempt presents an interesting option with its Spd-based Vantage effect; this allows Byleth to potentially go for OHKOs during the Enemy Phase against ranged foes he was unable to finish off, likely with a fully-charged Special trigger. 
  • Null Follow-Up is a golden standard skill among infantry units — and for good reason — as it allows Byleth to safely initiate without fear of having his follow-ups impeded by enemy mechanics, or to receive unnecessary damage from a surviving foe’s automatic double. However, as it’s now available as a Sacred Seal and an increasingly common buff, using it as his B skill is more of a last-ditch option if you really want the effect.
• Time’s Pulse 4 is ideal for Byleth’s playstyle here, placing him at the best position to leverage Sublime Heaven with multiple activations in most rounds of combat. That said, it’s very expensive so other options included Atk/Spd Oath 4 (for boosted mobility and damage), Atk/Spd Menace (for an easy stream of visible buffs and debuffs), and Joint Drive skills among other similar offense-enhancing abilities.

Weapon: Guide’s Hourglass

Assist: Positional Assist / Flexible

Special: Sublime Heaven 

Passive A: Atk/Spd Finish / Atk/Spd Ideal / Swift Sparrow 

Passive B: Windsweep / Watersweep

Passive C:  Atk/Spd Oath 4 / Time’s Pulse / Menace Skills / Joint Drive Skills / Flexible

Sacred Seal: Null Follow-Up

• While still offensive in nature, this build sacrifices some of the first set’s damage potential in exchange for greater safety in Byleth’s initiations. Still, an Asset to either of his offensive stats is recommended as his primary role remains as a damage dealer. 
• The core of this build lies in the pairing of a Sweep skill in Byleth’s B slot with the Null Follow-Up Sacred Seal, allowing him to benefit from the counterattack negating property of these skills while still being able to perform follow-ups regularly. 
  • This aids in offsetting his otherwise questionable bulk, especially as he often relies on his【Dodge】effect which grows shakier the more accessible means of negating it become. The choice between which Sweep skill to equip largely depends on personal preference.
• Any A skill that sharpens Byleth’s offensive stats works well here, with Atk/Spd Finish, Atk/Spd Ideal, and Swift Sparrow again shining as his best overall options. 
• The biggest change to his build otherwise lies to his preference in C skill, as Time’s Pulse becomes less powerful here compared to before: Byleth’s ability to trigger Sublime Heaven twice when equipped with Time’s Pulse is contingent on him receiving a counterattack in between strikes, which becomes less accessible with the Sweep + Null Follow-Up combination. Accordingly, those that directly add to his sheer stats (such as Atk/Spd Oath, Joint Drives, and Menace skills) should receive more priority.