The core issue I have with Sage right now is Addersgall overcapping.
It feels frustrating to have nothing to spend them on, especially when your mana managment is tied to it.
I think a spender or something must be added (or a way to convert addersgall into addersting when no healing is needeed).

Slap any cooldown on it so that is doesn't become the next energy drain, but it needs to be adressed.