Lee Sin's W
I think it would be a good idea to drop the spellvamp on Lee's W based on the premise that he only would ever deal magic damage with his E and in place of his missing spellvamp it could be he still has the lifesteal but he gains 3%/6%/9%/12%/15% damage reduction for 5 seconds (to match his lifesteal) since that will hone his late game a tad while still allowing him to jungle safely.