Let's make requests that make sense please
Fiora's passive makes sense as is. % Max HP true damage. it just needs a 30%ish nerf and a cap. Want to prevent her from building bruiser? Give her a flat, high cap post-scaling, and make the base damage scale with lvl. This way, she can snowball, buy AD and reach the cap very early, or if she loses her lane she can build more defensive and she'll only reach the cap at lvl 18. Then, nerf her Q cooldown. She really jumps around too much.