IT didn't matter that Lohse had like 15 spells to play with because she only get to use 4 most of the time.
You are aware that without some boost you only have 4 AP per turn? And most spells cost 2 AP.
Would you like her to have 15 AP per turn? Certainly it would make your fights easier.
How about a "kill the lot of them" spell? For 1 AP?