Does not necessarily need to be a new item perse. It could be part of a new item as well but my idea doesn't go that far. Anyways, I think with the nerfs to Rapid Recharge only giving +2 total charges down from +3, I think it would be cool if there was a T4 Spirit (or even maybe Vitality) that as a tangential affect provided +1 charge. In the same way that some items like Point Blank will provide +1 stamina I think there's some design space to add charges on items that aren't exclusively about adding charges. It's not an affect that you want to be cheap but it's another lever to pull in balancing items. For example, perhaps instead of Magic Carpet providing +10% duration, it could add an extra charge. Boundless Spirit also recently got a buff to also give bullet damage, in a similar vein that's also another item that I think could be cool to add a charge (especially considering its almost 11k).
I don't necessarily think that it should be an upgrade to Rapid Recharge since that's maybe a little too slot efficient, also just a little less interesting design wise compared to having it as an additional affect on another item.
I don't necessarily think that it should be an upgrade to Rapid Recharge since that's maybe a little too slot efficient, also just a little less interesting design wise compared to having it as an additional affect on another item.