How to stop dying from one-shots as an armour character?

Dont look at ehp. Ehp is a pretty unreliable fake number to measure tank. Use separate max hits for specific damage types.

You just need armour adds to elemental resi and you'll be fine. My wolf has 17k armour and 23k added armour to elemental and I can tank everything.

Is that unique helm required? Seems like its gigafucking you if its not. 60% life is nice but you really probably want the ele res. Ive only ever seen it used on Blood Mages but I think even just a t1 life roll and being res capped would help you a lot more. .ll

Your ele max hit is too low. You either need way more (like 2-3x) % armor applied to elemental, more flat life to scale with the 50% increased from veil of the night, or drop veil of the night and pick up resistances.

Did you hit your head? If I equip an ES chest, it doesn't mean I'm playing ES. Likewise, you aren't playing an armour character. You have a helmet equipped giving you zero resistances, 2 rarity rings. Of your two rares equipped, one is a hybrid base and you have 1 life roll. You didn't even get your last ascendancy despite being level 95, which would give 15% more maximum life. A T2 life roll on gloves and that ascendancy would give you +600 life.

26k armour can be sufficient in an actual build that has ~3k life and 75% res. Likewise you can use that helmet if you had significantly higher life pool.

EHP = how many small hits can you take in a row before dying, based on somewhat arbitrary numbers from POB (small hits in POB's case are hits that deal about 1K phys, 1K of each element and 400 chaos damage)

This build will be prone to one shots no matter what, it is the downside of the build, accept that or swap build. That said you're missing the grip of kulemak that could help with achieving higher armour to ele values.

I'd be interested to know if you've tried to play with a cultivated rathpith instead of the wand, not saying one is better than the other, genuinely asking out of curiosity.

You have zero resistance?

Remember you need around 10 times the amount of the receiving dmg as armour to mitigate 50% the dmg. You have 26k which means you can at most 2.6k to 1.3k dmg. And higher than that it’s exponentially worst mitigation.

EHP is calculated by counting how many small hits you can take, and armour is a lot more effective when taking small hits. That's the reason your BM with lower EHP is much tankier than your Titan.

There is no way to avoid getting one-shot with zero elemental resistance, since that game is designed in a way that elemental damage is much higher than physical damage. However, zero duration titan can be very tanky, check out my character: https://youtu.be/gM5QpfHQ8-0?si=tCkQqH8HuxUPeZLR

Either have all the Armour in the world.... or go with CI. Hate this meta.