Welcome to the newest "let's cheese out warframe's hard content! "

[Nyx]. I always liked using her just for the sake of having a stressless gameplay, like Loki. No enemy gives a crap about you (was not like this back in 2013/14).

[Nyx] full Tier 3 Vault (only) and 3 Necramechs, ez pz:
[Warframe] Heart of Deimos - Solo - Tier 3 Vault

You can fully solo the entire Vault [Hunt] with this build.

They simply start to ignore you, when casting your third ability (Chaos), and you can go and grab yourself a sandwich and a coffee.

Focus school:
Zenurik. Void dash yourself some energy [Regen] and you are good to go. Your abilities are also very efficient. Don't hesitate to spam them!

Most used abilities in this kit:
Chaos - Muy bueno! Use it as often as you want to stay safe and have enemies give a crap about you (+ defense objective) and rather fight each other.

Absorb + Augment - This is the real thing. You want to use this ability against the Necramechs. First of all: It won't be dispelled (as of its current state, but we know DE when they see some kind of OP-shit out there... so don't blame me, if this gets changed sooner or later). Secondly: It makes you invincible and you can freely (somewhat (more down below)) move.

Why not using [Chroma] or [Mesa] with their Damage Buff + Damage Reduction stuff?
Simple: Necramech's second ability does [Reflect] incoming damage. You know how OP our weapons can be. They will instakill you right away if you mistakenly hit a Necramech during that ability frame time.

Not necessary:
Mind Control - Just for the sake of luring enemies away from you and your objectives. Use it as you want.

Psychic Bolts - You can utilize this, due to shield/armor reduction, but honestly, you will wreck the mechs anyways fast enough. Feel free to use it.

As for the mobility deparment, we will use the [Stropha].
[Stropha] gives zero fs about enemy weak points being tediously to reach, since Stropha has innate punch through and an insane cone/angle which it shoots and hits at.
This is not a charge build, since Assimilation of [Nyx] already slows us down.
You will counter this by using forward+block+quick melee techniques, which will [Catapult] you towards your enemy. Very handy against Necramechs while being invincible.
Build: [*] Stropha - Fast Firing High DPS

Have fun and happy hunting Tenno!

Best regards,
Pacheon