I'm hoping we can create a thread to discuss some potential uses for Hand of Purity. I've seen a lot of speculation as to what works and what doesn't, so hopefully we can get a definitive list of abilities that Hand of Purity works for. If you know any abilities that it works then I can add it to the list.
The Stone Guard - Rend Flesh
Feng the Accursed (Each stacks. Best used at 2+ stacks)
Spirit of the Fist - Lightning Lash
Spirit of the Spear - Flaming Spear
Spirit of the Staff - Arcane Shock
Heart of Fear
Amber-Shaper Un'sok - Parasitic Growth (Best used towards the end of the debuff)
Blade Lord Ta'yak - Wind Step - About 30 seconds between casts. Enough to get almost every one
Terrace of Endless Spring
Brewmaster Monk - Stagger
If you have any abilities or thoughts feel free to post below.