The vast majority of my builds are designed to help others, but are also designed for me as reference points to know how I want to build my weapons. And I'm aware that the simulacrum exists, but unlike most of you that will give me shit in the comments, I have a life outside of this game. So this is what. I use when I'm not playing. I'M FULLY AWARE THERE ARE BETTER BUILDS FOR THINGS LIKE STEEL PATH, LEAVE IT ALONE!

Sevagoth, the phantom goblin shark lookin' motherfucker with, YAOI HANDS, is by far the edgiest Warframe in the game. If you don't run Mr goblin shark here for duration and efficiency for at least one of your configs, you, are sus. But if you are one of those people that can somehow run him with range and strength as well, you are either smarter than me, or are you're a veteran player that actually understands the game mechanics of modding.

Archon shards you can supplement mod space for one of three HP pool through that method. So that you can use that space for other mods to make your builds better. As far as archon shards, I put two azure shards into armor. One amber shard into casting speed and another into energy orb effectiveness. The final crimson shard into melee crit damage.

Sevagoth's Shadow:
https://overframe.gg/build/223493/sevagoths-shadow/sevagoths-shadow-build-328-strength/

Shadow's Claw's:
https://overframe.gg/build/210752/shadow-claws/shadow-claws-build-54k-damage-worth-a-7-forma-crit-machine/

But this build is designed as a mix of his two and one trash nuking along with a pretty decent amount of support to combine with his shadow form. On the note of this being such spam heavy build, I would recommend having above average efficiency via [Fleeting Expertise]. But since the only duration timers on [Sevagoth] are on reap, it's really not worth worrying about. Especially for gloom, since its a cast power, meaning it only has problems from energy drain.

One mod that you must run on [Sevagoth] is Energy Conversion so you can do a lot more deeps if you cast sow and then reap for its explosive AOE damage. But If you fill up Shark boys death well meter, you can cast Gloom and then switch to your shadow form to "reap the benefits" of glooms life steal and do what you please until the death well meter or energy drain of Sevagoth's base form.

But, one really abusable mechanic that you can keep in mind when making a build similar to this, is to run Preparation on the shadow. The game counts the changing of between forms as a fresh spawn, which will give Sevagoth and his shadow a full energy tank regardless of when and how you switch between forms.
Also, I would recommend looking up Triburos's [Sevagoth] video for a more "professional" guide with better explanation for [Sevagoth] and his other forms.

Keep in mind that this is how I build MY weapon's an warframe's, they work really well for me, so if you are one of those people that is going to to go into the comments and give me shit is to how I play the game, I will kindly ask you to put a tooth pick under your toenail and kick a wall. JOKINGLY OF COURSE.

If you do decide to follow my builds don't get butthurt if your numbers aren't the same, all the riven's are the ones that "I have rolled" so don't psyche yourself out if you don't get a riven that is a good as the ones in my builds.

Be sure to take a look at my other builds. I also recommend looking at the vault status of all prime variants in the second link below. If you want information on the quests and the requirements, I recommend looking on the actual Warframe website under the game dropbox to look at the warframe profile videos as well as looking at the quest guide and the faction types. Click the third link below if you are interested.

Wiki:
https://warframe.fandom.com/wiki/Prime

Warframe website:
https://www.warframe.com

My Guide for new Players!:
https://docs.google.com/presentation/d/1NDLcIbpVdBX559tW5RVLdmoZ1lNnf_3CsjMLL1KKtco/edit?usp=sharing