Cabinet of history.

Sure, why not. I just don't see much sense in stacking endurance charges and armour when you have maxed out Temp Chains. Maybe if you play Hardcore and don't want to use Lightning Coil\Iron Reflexes.

Fully charged uber Izaro: https://gfycat.com/JadedAmazingBird

Updated main post and

twinned Core phase 2 in 18 seconds: https://streamable.com/8nb3

Seems alright at the moment. Decent survivabilty and near high-end BV damage. Will have to use for guardians:

The basic idea is to stack chaos damage\damage and berserker's more damage in order to double dip chaos damage and subsequently DoTs together with attack speed and EQ reduced duration so it aftershocks with every hit.
It works very well so far and reaching 6K life at around lvl 93 is very realistic.

Abyssal Cry works well in this build, but I feel like it slows me down and puts me in dangerous situation when I try to gather up mobs for a juicer explosion.

The build is complete at this point. For the next few levels I would head toward Unnatural Calm for more ES. 10.7k at the moment.
Double mana regen amulet solves most of my mana problems, but I don't think it's possible to go without mana pot not being blood magic. Mana leech enchant on boots is a solid option for more seamless mapping, but I chose crit to increase Elemental Overload uptime.

14x Grand Spectrums together with gear and passive is equal to 1185 fire damage (not counting Pendulum of Destruction). That's enough to kill anything in the game by one ignite from single target setup (in the body armour). During general map clear I seldom use more than one GMP fuse.

This takes as a base a very known Berseker build which uses Obliteration wands together with Blade Vortex. However, nobody seem thought to add double dipping sauce in the form of Hidden Potential jewel, which provides me with 125% increased general double dippable damage for the price of one jewel socket. Cospri's Will instead of Carcass Jack allows better passive tree pathing as well as essentially a 7-link setup and makes Obliteration's explosions poison on hit.
I've been testing this combination right before 2.5 in Standard and it was good, but in 2.5 it jumped up a notch. My assumption is that "More damage for each blade" in reworked BV also affects poison for some mechanical reason or due to a bug.

Anyway, you can watch videos and figure out the rest. Enjoy the cheese.
Shaper: https://www.youtube.com/watch?v=hXcPXhlJtaw
Minotaurus: https://www.youtube.com/watch?v=kXEP_GkAt3k
Chayula: https://www.youtube.com/watch?v=m4O06QXEbHE
Uber Atziri: https://www.youtube.com/watch?v=U2CMmaIRqVY