Heavy attack build for [Sepfahn]. This is the build that [Sepfahn] do better than any [Nikana] varient.

[Nikana] on heavy attack will force slash proc, when pairing with primed smite faction will deal massive damage. In fact, i kill my test subject drekar bombard (one of the toughest grineer) at lv 175 in one shot

As this is heavy build, stance is not matter

For arcane, exodia [Hunt] is better at grouping enemy and then kill with single heavy strike. You can also run exodia brave to [Regen] energy (not working on slash proc kill, it need to be direct kill for effect)

[Berserker Fury] can be replace with Primed fury or Gladiator might or quickening

This build also share config for normal combo build here: https://overframe.gg/build/68789/

As always, if you can use other weapon to apply status (for example [Kuva Nukor]), your can replace [Sacrificial Pressure] for [Condition Overload] (note that [Condition Overload] dont have great impact on heavy atk like it does on normal one)

This is also how you mod with any melee with force slash on heavy atk (rapier, nikana, 2H-[Nikana], scythe, warfan, claws are the best. Daggers, tonfas, whip, machette does have force slash on heavy atk but they are weak)