Literature is required in order to understand why this is the most powerful build you can get on a Sepfahn blade : https://warframe.fandom.com/wiki/Damage/Slash_Damage

--> "The amout of slash proc damage is affected by faction mods, melee damage mods and crit damage mods."

What you want is a balance between the status chance (increasing the proportion of slash damage on your weapon or decreasing puncture damage), the attack speed, and what will actively affect the value of the slash proc damage.

• A pretty good Riven with a puncture damage malus.
• [Blood Rush] and [Weeping Wounds] ensure you will get 108% SC and CC at x12. Since the slash damage will represent more than 85% of the total, 108% SC is perfect.
• [Berserker Fury] and Attack Speed on your Riven allow the weapon to increase the number of slash procs and give a very dynamic feeling by smoothing the rough transition between some combos.
• [Organ Shatter], Primed Pressure Point, Condition Overload and Prime Faction mods are here to increase the value of the slash proc damage at its maximum.
• Exodia Force will sometime open ennemies to finisher.
• Naramon is needed.
• Arcane Dexterity is advised, playing Secondary Dexterity on a Kuva Nukor is probably the best combination you can get, although you do not really need to use the Nukor itself.
• Repeating the slide attack is a very (maybe a bit too much) effective way to kill huge crowds of enemies. Also, the movement speed while sliding is stupidly fast.

Tested with many Grips and Links, Peye + Jai II is the best compromise possible.

It melts everything regardless of the mobs lvl, as long as you are able to survive.

Tested in many survivals and disruptions (lvl 3000+).

Ideal weapon for any Warframe using Gloom.

Notes :

• The Riven displayed is my own one.
• Exodia Force can be replaced with Exodia [Hunt].