This is a small build I've got to help [Inaros] mains maximise his survivability with Negation Swarm and Caranis Carapace (and its set if you want).
In other words, this builds aims to make the actual best out of his tankiness and [Regen] pottential, by making every health point that is gained count more rather than just have a big number just for the sake of having big meaningless numbers.
Hope it helps you, enjoy.
(Don't forget to like and comment)

Possible Changes

• If you have a companion that can survive and attack, with Synth Deconstruct and Synth Fiber on you reliably, Health Conversion could be a great boost to your survivability.

• With a Helminth Charger with Strain Eruption and Strain Fever (even Strain Infection too), you can use Strain Consume on him for even more regen. I would not

• An option floating out there is also using the mecha set on him, though not tested and prob not worth it.

• In case you seek to have more upfront tankieness instead of actual tankieness (because you ain't got time for Adaptation to build up and don't want to use Negation Swarm and lose HP for 1 sec), you could consider using the carapace and umbral sets with Primed Vigor and Gladiator Resolve instead, for an EHP of over 51k. If you don't want to change polarity from the build that I have shown you while trying this half-a-hundred-thousand EHP, just [Sacrifice] 1k EHP by removing Coaction Drift and still having over 50k EHP. Though that ain't worth it at all since you are througing away the reason people use him, to tank high lvl enemies and ignore everything they through at you (like knockdowns), not oneshots from friends in the simulacrum (it's still weak against those, since he lacks any Invulnerability or have some sort of shield gate). As for you animal friends linked to you armour and health, your 40k is more than enough for em, believe me.

• Changing the frame to something like Nezha or even Rhino could be an even bigger buff, if not the biggest buff, to your tank build.