When you have your sightstone, make sure you ward jump as much as you need to. Try and use it to set up ganks by ward jumping behind them and ulting them towards your team mater, or you can use it for escaping over walls with the pro lee sin jukes. The ravenous gives you heaps of sustain especially when you get the points to your W later. Remember if you have just had a team fight or you are about to force one, and your on low health, go into the jungle and lifesteal with your W as the sustain with W, bloodthirster and the ravenous hydra. This avoids the annoying recall, when you dont need or want to buy anything

With this build you can team figh twell, aswell as assasinating that annoying fed AD carry or that annoying fed AP carry....or....the teemo..

So good luck with this and use it to dominate every time in the top lane, as the master of blind fury.

Lee sin excels at early game damage, make sure that unless you are vsing a hard counter, that you always poke and trade as much as you can. If you end up taking too much poke, you can always max your W mixed with ravenous hydra.

A good time to pop your red pot is either defensive or offensive. A defensive way is if they go all in on you, you can use your red and survive, otherwise the offensive can be used when they are low and you have hit your q. Activate the red pot, then re-activate your Q