Charged Staff and Potential supp gem synergy.

Combining those gems sounds great, since they both rely on using power charges to gain something. That's cool, especially when considering the fact, that Charged Staff need to consume power charges to even activate and grant a buff, and Potential makes a supported skill gain crit chance when a power charge gets consumed.
While running a monk with a Combat Frenzy and Resonance keystone combo, it would easily be a no-brainer pick for me.

But I have one problem with this synergy.

Using Charged Staff consumes all power charges, and it's easy for me to regain them with the above-mentioned combo.
The problem arises when you put a Potential supp gem into it. Stacking up the charges is almost impossible while the buff is active because the power charge gets consumed by the lightning wave as soon as there is one available after the initial buff's activation.
That shouldn't have a place.

Referring to Potential's description:

"

Supported skills will consume a power charge on use if possible

This rule should apply only when a power charge is consumed on the activation of the buff where I actually, well... use a skill.

A crit chance from Potential should be applied upfront to all possible instances of damage provided by Charged Staff's buff, lightning shockwave included, until the buff expires or is reactivated, refreshing and repeating the application.
Instead, it seems like it's used on the activation and separately when the shockwave is lunched, whenever there is a spare power charge to utilize, consuming it in the process.


That got me wondering.
Is Charged Staff's lightning shockwave considered a separate skill that gets cast on attack while the buff is active, or something like that?
If so, then that's a pretty wacky implementation, but it would explain Potential's behaviour, according to its description, implying the on use part of it.

All this made me a bit confused, maybe I missed something along the way.
Maybe it's a bug or maybe not.
Either way, I think it's something worth mentioning.

Actually, you're right. The charged shockwave is considered different skill when activated. When you hover over a support gem you will see two support grms for charged staff one is called charged staff and another charged shockwave. When you attack, the shockwave that come out is casted, so any on-cast support that support charged shockwave will activate at this time.