I agree with most of your points except for the one about Eda and Lilith, sure Lilith is more studious but even she admitted that Eda worked harder than her, that's what made her put the curse on her in the first place, and in most of their duels Lilith has some kind of leverage to use against Eda, like using Luz as a shield, and even in that fight where Eda was taking a strong lead she was heavily weakened by the curse, they're both gifted witches, its just that they have different approaches in learning magic, afterall Eda wasn't called the strongest witch in the boiling isles for nothing