I've been playing a lot of map blasters this league, and I wanted to try something a fair bit tankier. Full cold/lightning/phys to fire defensive conversion has always been something I wanted to try, and boy does it deliver. Unfortunately, a 35div item (sublime vision - purity of fire) is required to play, so its not for everyone, but I ended up making the whole build for around 60div.

Offensively we also turn our phys into fire, both BV and asenath's glove explosions. combined with Herald of Ash and some big AoE scaling, the clear feels pretty fantastic.

I hate Ubers... but I did several deathless on this build. I'm pretty sure that I could have walked away from my PC during the Uber Shaper fight and I would have survived. The Uber fights aren't the fastest, so I wouldn't recommend this if you want to be a pure boss farmer, but if you just want a build thats good for all content, I'd say give this one a look!

PoB: https://pastebin.com/mpZtaHYd