I'm not going for Eff in this build cause his [Exalted Blade] is situational, You will be able to cut down Hordes effectively and the other Weapons on hand are fun to use as well

This is one part of a full set, a LOADOUT. You will be using this entire setup like I do
Primary : Daikyu | Harmony from Body to Blade Unlocking the Warrior's Secret to Immortality : https://overframe.gg/build/173556
Secondary : Akstiletto Prime | Mag Dump : https://overframe.gg/build/186511
Melee : Nikana Prime | Limitless Blade | Condition Overload : https://overframe.gg/build/173560 or Viral/Slash w/ Atk Spd https://overframe.gg/build/206760
Exalted Blade : https://overframe.gg/build/173561
Other Weapons : Deployable Archgun : https://overframe.gg/build/173577

Companion

School of Focus: Naramon

Panzer Vulpa | Viral Spitting, Spore Spreading BEAST and Healing : https://overframe.gg/build/173564
Smeeta Kavat | Lucky Charm, Armor Stripping & Lethal Killer : https://overframe.gg/build/206735

Focus Schools & Operator Equipment : Haven't done any experiments besides playing Zenurik for the energy and using both Elevate and Repair
I would go with Unairu, Sundering Dash at Max, Void Spines at Max and Stone Skin at Max
Elevate is the fastest at Healing, coming in and out of your Warframe is faster than popping out and staying in Void mode effectively, I pair Elevate with Anomaly to bring enemies in as all I have to do exit and enter My Warframe one or two times to fully heal it and then I begin Melee-ing the Horde to wipe them out

Notes : if you don't see X mod here or on X weapon listed it's probably cause I am POOR and I must grind til I get it, once I do I will update the build, Equip Decaying Dragon Key for better Results, Swap out [Chromatic Blade] for [Furious Javelin] and [Power Drift] for [Cunning Drift] to Buff your main Melee weapon and a little Range to help Radial Javelin, if [Adaptation] is not your thing swap it out for anything else but I would swap it out for Rolling Guard, or if you DO like Adaptation but find that it's not ENOUGH swap out Rage for Rolling Guard, Swap out Augur Secrets/Rage for Flow for some more Energy for things like Railjack/K-Drive Races, or if you just need more Energy, [Streamline] when you have [Blind Rage] on Excal is literally no point as the energy cost difference is minimal, if you care about Efficiency then go for this build | https://overframe.gg/build/205738

Some might think [Rage] is pointless, I think [Rage] is a comfort, Having energy be there when you get hit about as hard as being slapped by your 8yo little Sister and then being fueled by the burning [Rage] of a thousand young suns is quite empowering, for me at least and as for switching to [Hunter Adrenaline] I don't really care to unless I need the Hunter Set bonus for whatever reason, anyway I would replace Rage with Continuity/Primed, especially for the Radial Javelin build

Subsume : I would replace his 1 with [Seeking Shuriken] and go the [Furious Javelin] Build, however I have not tested it and cannot confirm effectiveness, but I have tested Breach Surge's capabilities and it is effectively a direct upgrade from his 2 so I would replace that for Breach Surge you do lose the Sentient Strip Resistances ability but you keep the Stun and Open to Finisher perks but get a HEFTY damage bonus where you'll be capable of doing upwards of 2mil damage heavy atk hits just from counter 0, though you do look kinda strange doing the worm all of a sudden and a burst of energy surrounds you and you're imbued with the power of a white dwarf at the end of it's lifespan going supernova, but that's just my opinion

Excalimitless the Immortal Blade | Helminth : https://overframe.gg/build/207392 or ALT https://overframe.gg/build/207442

If I had Arcane Energize and [Guardian] I'd equip it.. if I HAD it, I usually have Acceleration and Primary Charger as I want the [Daikyu] to hit as hard and fast as possible, [Split Flights], will make killing Hordes a breeze