I wanted to make a build that wasn't gimmicky and capitalized on Sevagoths strengths. Since this is a Steel Path build, meaning you're going to be solo most of the time, he doesn't need massive range, so I focused on STR to slow enemies down, grant him high life leech, and create an incredibly powerful [Shade].

With this build, [Sevagoth] shouldn't have energy issues and does not require Arcane Energize. When you're running low on Energy:
1) Disable Gloom
2) Operator from Void [Rush] for Energy [Regen] (Stacked with [Energy Siphon])
3) Summon your [Shade].
4) Murder goons

By the time your Shades timer is depleted, you should have more than enough energy to refill your Death Pool and then some.

I initially tried a build that looked promising on this website, but after wasting several forma and hours of my time, I came up with this. It's honestly one of the funnest builds I've tired in Warframe.

Note:
1) Arcane Avenger can be replaced with any arcane you like.
2) You don't need a Kubrow.
3) I do not recommend replacing any of his abilities.

Shade Build:
https://overframe.gg/build/294533/
Claw Build:
https://overframe.gg/build/294529/