Would something that absorbs the spell, then sends the raw energy back at them fine?

Also i was thinking that her mana could be really small, but have some other learned trick that either helps fix the problem.

Like giving her spells charges different levels. She'd only have 1 at first but if she charged it to that point the spell would have some extra effect.

Although I'd have to change a lot of her spells.

It would go something like this.

lvl0-Arcane shot--Shoots dark energy out directly to attack. Can break a rib if hit.Shaped like a bolt.

lvl1-Dark sphere shot- A stronger and more controlled arcane shot, although easier to see coming. Can shatter a rib cage if hit. Shaped like a pitch black ball.

Since shes in this body it will help show she has to use efficient spells instead of strong spells typically trying to master them, and create new effects.