PoB - https://pobb.in/hPCvakfKF6Fi
** Read the Notes section first **
PoB has League start, Budget and Endgame sets/loadouts, be sure to follow according to your progression.
Tried this build right before 3.25, it's a good mapper, quite tanky, decently easy to gear at league start, the uniques in the endgame setup should be affordable around 4-6 days into the league.
Cold Snap of Power has 320% Damage Effectiveness, 10% Base Crit Chance (1 of the only 3 skill gems with this high base crit), it does have a downside of a 3sec CD, but we easily bypass it with investment into Crit Chance (Mainly Power Charges) with a goal of having 100%, and linking it with Spell Echo for 2 hits per cast.
When you first enter a map/boss fight there might be a chance that your first cast will go on cooldown, we can handle it by having a 3 link with Storm Brand + Power charge on Crit + Increased Critical Strikes, 1 cast and you go up to maximum power charges and you're good to go.
If you have any questions, feel free to ask in the Video's comments section, i'm mostly active there.
Good luck!