This is my personal General Use [Atlas Prime] build.
Works in literally every type of mission always get top damage, is super comfy to use, and is tanky as hell.

How does this build work?
It's quite simple, you use Eclipse after using zenurik and hardened wellspring, which will grant you a lasting dmg buff to your Landslide.
Then just spam your 1, nothing else required, zenurik should out [Regen] your usage with [Streamline], if you feel like it, [Augur Secrets] work great in place of [Streamline], it also enables Shield Gating, in case you find yourself ever dying with this build. A good stat stick is required to get those juicy 50+mil damage numbers, I will post the one I personally use later.

Why those mods?

Aura: [Steel Charge]? It's here for bonus mod capacity and slightly more damage from Landslide, can be removed if you want to.

Exilus: [Power Drift] is here for some nice bonus 15% strength, and the knockdown immunity chance is nice if you screw something up while in the air.

[Umbral Intensify] is used to grant us a 77% increase in Strength, giving us a huge damage bonus.
[Umbral Vitality] is here to make us way more survivable, giving us A LOT of health, which is affected by our ~3k armor, granting us over 90% damage reduction, while also lifestealing using our Rubble passive.
[Umbral Fiber] is used simply to enhance other Umbral mods, and give some overkill armor.
[Path Of Statues] is core of this build. Grants us insane CC and a way to get life and armor.
[Adaptation] is here to simply make us tankier, upgrades don't matter, I put it at that level here to top up usage, but it can as well be used at R0.
[Rubble Heap] is a nice damage bonus in long endurance missions, you can swap it for other augments like [Ore Gaze], if you would like some sweet bonus loot.
[Streamline] is a flex slot, I sometimes swap it for [Augur Secrets], when I feel like being even tankier, and doing way more damage.

Why those arcanes?
Molt Augmented is simply a nice damage bonus, nothing else, isn't necessary, can be replaced with energize or whatever you prefer if you want to, Augmented is just my preference.

Arcane Avenger is required in this build, [Atlas]' Landslide crit rate is nonexistent, so flat boosts increase its damage SIGNIFICANTLY.

Helminth?

[Atlas]' 2 is literally useless in my opinion. I prefer slapping damage buffs in there, Eclipse works best by far. You can use Smite (with infusion), [Xata]'s Whisper, Roar or Breach surge if you wish though.

What else should I use?

I HEAVILY recommend a good stat stick, along with Adarza Kavat, the 60% crit boost, along with Avenger, raises Landslide's crit rate to 110%, heavily benefitting from critical damage mods. Armor strip from kavat is nice from time to time on tough targets, though usually overkill.