I won’t get into the argumentation above because I’ll simply need to give the comments to your build to help solve the whole situation:
Your HP is ridiculously low, you’ve not invested properly in it, that’s the main point why you’ll not advance, ever, no matter how good your offensives are you’re a one-shot wonder there.
So let’s alleviate that:
Farm ‘The Black Sun’ timeline and switch from the HP blessing to the crit blessing, it provides a higher upside then the little HP you get from it.
Take 2 of the current crit idols you have and instead put %health/health into them, this already fixes a chunk of the issues. If you don’t have them go for idol rewards until you have, they drop sooner or later, you should have around 5 of them by now through sheer chance with that level.
Now every gear piece:
Amulet… take a res base to free up space for those otherwise, the health implicit is not very good. Make sure to get a T6 or T7 health one if possible, otherwise a rare suffices. One with T5 lightning pen and T5 lightning damage as well as a T5 resistance of your choice or crit avoidance.
Chest… that one currently has a single very useful affix for you, which is int, everything else is worthless on it. You barely go into armour, you have overcapped ele res, you don’t use arcane ascendence.
Go for a hybrid health/%health one with 2 useful prefixes. Rare suffices, better then yours by far.
Belt… you got lightning damage on it, everything else is useless. The experimental affix is not worthwhile enough to ignore resistances and hybrid health, not even remotely.
Relic… is detrimental for you. You seem to struggle with mana already, which is the whole reason why you invest your whole main skill into it, to use the others more often. Why reduce that ability by having a sort of mana shield cutting into your offenses? Use another one with affixes that are good for your build. The +1 to frost claw is not worth it at all.
Boots… any 4 T5 rare with fitting affixes is better, why no movement speed?
Gloves… same here, any random 4 T5 rare is better.
Idols:
Remove the ‘Humble Etterran’ and ‘Ornate Glass’ idol, slot in 3 %health/health ones instead.
The ‘Adorned Arcane’ idol is also fairly useless for you, more crit/health/lightning damage.
Blessings:
Ending the storm for lightning res
Age of winter for cold res… endurance at your life pool is worthless.
Spirits of fire for fire res.
Overall:
Get your crit avoidance to 100, mandatory.
Get your health up, mandatory.
Cap your res, very important, get close to it again after equipment changes.
TLDR:
Your build currently is an absolute mess and by now means even remotely are the levels at fault there.
Not even remotely, they won’t help you at all, they’re a nice bonus… but you don’t have the basics of the basics down.
There is, your build is just one major mess.
Also some skills need adjustments, they’re at times quite old and need to be updated, that is known and should be remedied, you’re absolutely right there.