How to properly "nerf" Lee Sin.
I'll be blunt. He does way too much targeted, reliable damage with just 1 or 2 damage items. The base damage on his ultimate is insane for the utility it provides, and should be toned down, but given a higher bonus AD scaling so AD lee's can be the same as they were before. Here's what I suggest:
Ultimate base damage lowered to 100/200/300 from 200/400/600
Ultimate bonus AD scaling increased to 275% from 200%.