Dual Dagger Heavy-Attack build.
[Fang] Prime has the highest crit chance and crit multiplier from all dual daggers.
Dual Daggers have a forced Slash Proc on Heavy-Attack, main-damage from puncture can be ignored.

Focus Energy with Zenurik's Inner Might gives 90% Heavy-Attack efficiency
and with Primed Fever Strike also creates corrosion.

High Heavy-Attack efficiency with [True Punishment] and primary and secondary dexterity should keep the combo at 12x all the time.

Combine with the new warframe mods Amar's Hatred and Amar's Anguish for a 20m teleport.
This build is a fun off meta alternative for a Level-Cap Slash build.

Replace [Focus Energy] with a rank 2 [Reflex Coil] to avoid using umbra forma.