I am going to have to agree with the topic creator. I actually DO LIKE overpowered spells. For me a game should be fun. I don't want to stress over not being able to beat a boss.
I don't have loads of time on my hands and a challenge is not that fun for me. The only challenging game i love are puzzle games.
I want to enjoy a game for its scenery, great music, story and gameplay.
However, instead of having overpowered spells, can't you just make a 'super easy' difficulty level?