How to balance out Lee Sin once and for all

**Lee Sin: ** So he can be a solo Q god. But Lee Sin fell from ranked 5's recently where he finds less opportunities for succesful ganks. He relies on snowballing so much, but when he does, he's so oppressive to play against. So basically he should cut a bit in power early and regain some at later levels.

Passive: Flurry energy regained from 15 to 15/20/25 at ranks 1/7/13

=> rewards making good use of his passive

Q: base damage lowered from 50/80/110/140/170 to 50/75/100/125/150

=> His Q just has everything, very high base damage, missing health execute, a high Bonus AD ratio AND it's a gapcloser. Almost everything of his power budget is in his Q. -40 damage at max ranks looks like a lot. But he still HAS a lot 300 + execute + 1.80BADratio

W: Cooldown decreased from 14 to 14/13.5/13/12.5/12

=> just some added survivability in lategame, provided he has the energy

E: Slow changed from 20/30/40/50/60% to 15/30/45/60/75%

=> A small decrease in early ganking power and a nice boost for late game disruptiveness in teamfights

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So in the end it's a nerf and a buff at the same time. You'll have to do more than just hit 1 Q to be succesful, but in lategame you'll be able to provide a bit more utility in teamfights. given you are making correct use of his passive.