Question about procs (Blind Fury)

So, let’s assume that I assign Blind Fury to a Soldier skill with a somewhat high cooldown (let’s say, Blitz).

Does Blind Fury procs only when I get a critical hit from Blitz, or ANY critical hit can proc it?

Trying to build a Forcewave DK build, and it seems kinda strange that they put such a powerful devotion skill on such a high-cooldown skill…

Critical hit from THAT skill it is assigned to.

I skip blind fury on forcewave, you’ll have enough AoE from Forcewave alone.