[HELP] My build . Pyroclast Mine conveter Chaos.

This is my first build in this LG. There are many errors please help.
I use x2
Bodyarmor :
I aim for CRIT dmg and fire to chaos.

My profile : https://www.pathofexile.com/account/view-profile/hoangphongvu1/characters
My PoB : https://pastebin.com/JmSZQgsC