[Looking for advice/help] Too Squishy Arc Elementalist (SSF, homebrew)

Hey everyone,

I'm looking for some advice for my current character, as I feel way too squishy to even comfortably run T1 white maps for the most part.

https://pobb.in/UIG9hM_29UBr

Notes;

- Damage/DPS feels good, clear speed is high with Arc, some rares can be a little tanky, but I can manage
- Playstyle: Use arc for cleaning packs, then Arc + Orb of Storms + damage flask for rares/bosses
- Resists are more or less capped, cold is 5% short (felt much easier to get than in previous leagues, although I've played nothing but duelist previously, first time playing a witch)
- I feel like 1.6k health and 1.9k ES with those resists should be quite tanky, but it isn't.
- I feel like I get "one shot" a lot, or at least its so fast that by the time I realise I've taken any damage, I'm already dead.
- I haven't completed 3rd lab yet, last time I tried I got melted/oneshot by something so decided to come back to it once defences are sorted.
- Not following a guide, playing SSF and just working with what I can get/craft (more fun to me than following a set guide, although I understand that will be a suggestion and my approach will be a lot tougher)
- At the moment Mana is a problem and doesn't recharge fast enough for continuous attacking, but I'll be working on that. I will likely take some DPS off the passive tree and pump it into mana
- I have not pushed towards any armor/evasion, is that critical for me?

Any general advice here would be welcome, especially if there's some obvious defensive layer/strategy I've completely missed or neglected.

Spec out of Bastion of Elements and into Liege of the Primordial.
Take Golem Commander on the tree.
Summon Stone, Flame (Chaos if you go ignite - see vid below), Ice and Lightning Golem. More damage, more defenses and also solves your mana problem.

Early maps it is better to start with Armor/Energy shield and to switch later to full Energy shield/Chaos Inoculation. So switch to that and use Determination.

Wandslinger does nothing for your build. It is only if you attack with your wand and not cast spells.

Puh a lot of other stuff. Just some quick fixes: https://pobb.in/mRjwTzrdlnqP
Defenses should be even better with switched Armor. Needs some + Strength on gear!

If you want to keep playing Arc, you should take a look at this:

https://www.youtube.com/watch?v=9OGEvZWXvrA

The "Early Maps" of his pob should give you some idea what to do.

Edit: Forgot to lower the level of skills in my pob. But I hope you get the general idea.