Siora oneshots instantly

I don't understand what this boss is doing with the vision from 0.2 to 0.3. After all the bosses of Act 4 and the other two interludes, the bosses of which looked like scared children, Siora just oneshots with her first attack. I was just stuck on her and died more than 30 times.

40 times

50 times. Is there any way to skip this bullshit?

She was a crazy difficult fight and unreasonably so for a melee character. I think it was way overtuned and needs a nerf.

By that fight I had 900hp and 1000 ES, but due to the constant lightning hits that will hit you, you have no chance of regenerating the ES, so you can consider yourself to have around 900 hp. The boss literally hits for 800hp with most of her attacks, is crazy aggressive and has no downtime in terms of her attacks.
What's worse is that outside of a few attacks, most of her attacks deal damage around her in an aoe so most of the fight you will be losing hp bit by bit (if you're not getting hit by her big attacks, which will one shot you most of the time).

Because I had a decent build and did decent damage, and could BARELY finish her off with ranged skill attacks, and that's for an experienced player, for new players this will be a new player destroyer. Act bosses and other bosses I've had thus far were NOTHING compared to Siora, which for a area boss is ridiculous.

For ranged characters this fight seems difficult, but doable because you can still keep distance and just play it safe against her by keeping distance. For melee characters this feels like a huge build & skill check that is impossible unless you have 75% lightning res, deal good damage and play like a god. If I didn't have glacial cascade to whittle at her when I couldn't attack her from Melee, I would still be fighting her.

This boss has an undodgable practically untelegraphed instakill against mele players. In the endgame with capped resistances, 50k armour applies to elemental damage, 4k life, still get one shot by that attack.