Q: do you end the fight with (nominal value) 50% mana left?
A: use the chalice
Q: do you struggle with mana during the fight?
A: use the Jar and the Core
This is pretty much all it comes down to, i'm currently toying about with Moonwell Chalice instead of the Jar.
Gotta say, i dont like adjusting to missing an "extra" mana potion overall its pretty sick if you use it every minute tho.
edit: still using the Mandala of Stirring Patterns along with it, dont know if that helps but thought i'd mention it