How's it going everyone. Here is my build, as advertised on Reddit. I've gotten tremendously good results with this build in general steel path content, including Archon Hunts and Duviri. Haven't tested in long endurance runs, but who's really got time for all that? Certainly not someone who forma'd Sevagoth 15 times.

Luckily, you'll be intimately familiar with all of Sevagoth's abilities by the time you're done forma-ing him. So I won't bother going over his abilities too much, but always be sure to have Gloom up, and to be rotating your abilities. Being able to hop in and out of [Ghost] is a huge part of our survivability.

First and foremost, [Sevagoth] recently got an Augment Mod that is incredibly good! I made this build long before the augment came out. If you'd like to include the augment, which I plan on doing, I would forma an = polarity over [Augur Secrets] and include it there. If you've made it this far in the build, what's 1 more forma when you've already spent 15, right? Right...

Second and not too far behind, I personally believe that [Preparation] is mandatory on [Sevagoth]. [Preparation] ensures that every time you swap into your [Ghost], your energy will be full. [Sevagoth] is also a slow starter on missions. It's hard to build up your meter with almost no energy. [Preparation] ensures we hit the ground running every mission.

[Corrosive Projection] is used and not [Steel Charge] because we're running [Steel Charge] on our [Ghost]. I haven't experimented with shield gate shenanigans on [Sevagoth], but if it works then [Brief Respite] could be a viable alternative to [Corrosive Projection].

[Hunter Adrenaline] can be swapped for more duration if you have Arcane Energize or some other way to generate more energy. I found the thing that killed me most often on [Sevagoth] was running out of energy.

Molt Reconstruct is a flex spot for Arcanes. If you have no issue with survivability I'd suggest swapping it for Arcane Energize, or damage focused arcane.

I recommend running a status primer for this build. [Epitaph] is a great choice for both flavor and function.

Optimal damage rotation would be to (assuming Gloom is active) cast 2, cast 1, prime, go into shadow form (4). In shadow form cast your 1 at a group of enemies and watch as your combo counter instantly skyrockets. Cast your 2 and 3 as needed for survival and don't forget to monitor your health and swap back to [Sevagoth] before the [Ghost] dies. IF YOUR SHADOW DIES IN A MISSION WITH REVIVES DISABLED, YOUR 4 WILL BE DISABLED FOR THE REST OF THE MISSION!!!

I have not tested Archon Shards on [Sevagoth] yet. Some melee buffs get kinda janky when it comes to [Sevagoth] and his sidekick. I have absolutely no idea if Melee Shards on [Sevagoth] will transfer the buffs to his shadow and claws. I would recommend just running whatever you have. This build was made with 0 Archon Shards, so anything you add will just make the build better.

Links:
Sevagoth's Shadow: https://overframe.gg/build/534682/
Shadow Claws: https://overframe.gg/build/534681/