In Path of Exile, Maligaro was a thaumaturgist shortly before the Cataclysm. He worked for Malachai in the Chamber of Sins as one of his Godless Three, along with his apprentice Doedre Stamatis.

It was Maligaro who invented the idea of making humans even more connected with virtue gems than gemlings, extracting the very essence of the gem and inserting it into the body. He found his work very creative and was considered an artist.

Another of Maligaro's creations is a synthetic virtue gem. In his private life, he was quite eccentric, maintaining a homosexual relationship with his slave Raulo. When the Purity Rebellion overthrew the Emperor, the new Emperor Voll had burned Maligaro at the stake.

As a new player, first time you may currently stuck with this boss as an Elementalist. One player said that he have been having a countless death with every miniboss and boss he have encountered except for Brine King ever since Part 2 started.

If you are confused, hope that the following tips will help you:

Dodge the big wind-up attacks with Flame Dash, don't get caught out casting, have your stuff set up ready for his 2 big summons, make sure you have full flask charges before entering the arena. That's your tactical stuff.

But really, there's a good 70% chance it's down to your build. 800HP is honestly awful at the stage you're at, it's nowhere near enough. It's likely you haven't put much Life investment into your passive tree, or at least not enough.

Get some cheap gear on poe.trade with Maximum Life rolls if you can and fill out your character; survivability should be your concern in this game, especially while leveling. Life is the easiest and simplest way to achieve that.

You don't need CR for that fight, pretty much no-one bothers with Chaos Resist at that point in the game unless they have specific legendaries with it for their build.

Also, try to 4-link your main attack at the very least. Doesn't take much investment and can go a long way. Follow some guide from https://www.u4gm.com/path-of-exile.