Ele/crit-Bladefall build (Need advices)

Hello guys! I am building a elementalist-crit bladefall build similar to mathil1's Ele/crit-Bv.



This is my char that I had on HC so far (It died at lvl 87)
PoB:
It reached almost 200k with a 5link

The playstyle is pretty safe and fun to play, stone golem for taunt + some life reg, and clear everything with bladefall + herald of ice, on bosses decoy totem + stone golem then spam bladefall until boss dead.


(Playing with mathil1 Ele/crit-Bv build) It ended up with 1M dps:

PoB:

lvl 99 passive tree



We could add a lot more survivality by lossing some DPS for HC, we can manage around 800k-900k dps.

I want to know If you guys have any advice for this build, the passive tree, items, flask, etc. I started to play the game a month ago and I still have much to learn. Its this build End-game viable on HC? What do you guys think?