Games : What counts as a "hit" for the new affix on Broken Promises?

Patch 2.2 re-worked some legendary items, among them the Broken Promises ring. It's new affix states:

After 5 consecutive non-critical hits, your chance to critically hit is increased to 100% for 3 seconds.

So, what counts as a hit? I know regular primary attacks will. But do gem procs, such as Miranae's smite? The Wreath of Lightning's AoE zapping? Pet attacks? Do AoE attacks count only once, or once per monster hit? What about sustained skills, such as Sweeping Wind?

Way of the Hundred Fists also has an attack that does multiple hits. You can easily see it calculate crits separately per hit, so do those count as separate hits for the purposes of this affix?

I can see a non-crit build, buffed with as much attack speed as you can stack, keeping this proc up almost 100% of the time.