Kempf

Weapon: Venin Edge

Assist: Positional Assist

Special: Escutcheon / Sacred Cowl

Passive A: AR-D Spd/Res 3 / AR-D Spd/Def 3

Passive B: Windsweep

Passive C: Fatal Smoke / Savage Blow / Preference

Sacred Seal: Deflect Melee / Phantom Speed

• As a member of the Meta AR Defense Sword Cavalier trinity (The other two members being Sigurd and Eliwood) it should come as no surprise that Kempf’s main role is as an AR Def sword cavalier who can punish the opponent heavily for brainlessly end turning in his Attack range.(Brave Ike users anyone?)
• Kempf’s Venin Edge is what makes Kempf into a deadly threat on AR Def, as the debuffs it inflicts(10 Damage and Counterattack preventing status) only require Kempf to Attack and doesn’t even require him to survive combat. This means that regardless of whether the foe successfully KO’s Kempf or not, they’ll still be weakened and made easy prey for any other team member who can follow up on Kempf’s attack.
• Despite this, one still wants to make Kempf as difficult to KO as possible, so that he can also take advantage of the new Fatal Smoke, which cripples his foes even more by denying their ability to heal in combat. AR-D Spd skills are perfect for this, as they grant Kempf a massive stat boost as long as his team’s AR Def structures stay up. 
• Windsweep adds an additional layer to the threat Kempf poses on the foe’s enemy phase, as if he wins the Speed check, the foe can’t counterattack at all without the aid of Null C-Disrupt, and it’s downsides are irrelevant to Kempf, although one should be wary of extremely quick sword users such as Fallen Ike and Mareeta.
• Deflect Melee allows Kempf to absorb even more damage on his Player Phase should the foe get through his Windsweep and perform a follow-up attack against him. Phantom Speed can also be used to increase his Windsweep threshold.

Weapon: Venin Edge

Assist: Positional Assist

Special: Luna 

Passive A: Swift Sparrow 2 or 3 

Passive B: Windsweep / Lull Spd/Def

Passive C: Fatal Smoke / Joint Drive Spd / Preference

Sacred Seal: Savage Blow / Atk/Spd Solo / Swift Sparrow

• Unfortunately, unlike the other members of the Meta AR Def sword cavalier trio, Kempf’s nowhere near as outstanding when used in a capacity other than Aether Raids Defense. He can still perform reasonably well as a Player Phase sword cavalier in other modes, however, as his role as a passive damage dealer cannot be replicated by any other Sword cavalier, and Kempf additionally has access to Fatal Smoke, which Staff users lack.
• Kempf’s Venin Edge is still his best choice of weapon, as even if Kempf fails to KO the foe, they’ll be left weak enough for another ally to finish off. 
• Swift Sparrow gives Kempf a sizeable boost to his offensive power during player phase without any drawbacks, and the Speed boost can help him immensely with outpacing foes and activating Windsweep, or just scoring follow-up attacks in general.
• Windsweep helps Kempf take advantage of his exclusive weapon by protecting him from Enemy counterattacks, although bear in mind Windsweep does not work on dragons or magic users. He can also use Lull Spd/Def for a stat lead and buff negation against foes, but Kempf is generally not the best option for a straightforward player phase cavalier(Hello Eliwood).
• Fatal Smoke allows Kempf to cripple foes even further after combat, although unlike his Venin Edge, Fatal Smoke will not trigger if Kempf is Ko’d during combat. Joint Drive Spd can also be used to grant a Speed buff to both Kempf and his allies.
• Finally, Savage Blow allows Kempf to stack passive damage even further, but Atk/Spd Solo and Swift Sparrow also solid options.