Are we talking first cycle of jungle? Amumu is like <1/2 hp during his first jungle cycle. After that yeah he's annoying as **** and pretty hard. And I know that i've gone to gank annie about a thousand times and she just poops on me somehow and I die, I started making the laner bait her and usually he dies

Haha, I meant ganking her, you can't tell me you haven't gone to gank her and she just turns around and annihilates you with her ult

PS: I'd hope you'd be able to kill an Amumu that was low health, we are assuming that Amumu is full health and you are also. Odds are he will cry on you until someone comes to assist him, and we know that in solo queue, your team will not help you.

Ahaha, what Lee Sin has trouble with Cass? C'mon Jp. We all know what happens when they face off.
On a serious note, amumu is very easy to counter jungle, and it's best to interrupt him at wraiths, i've gotten ***loads of kills by just going to do his wraiths instead of mine and melting him. A lot of times you can burst warwicks into running away as well, which is a mistake on their part because they can outlifesteal you. The only jungler that does work against lee sin is nunu, and nobody plays him because he's ****. Oh and really good trundle's can take lee, but there aren't very many good one's out there.

Like I posted earlier, Madred's Bloodrazor is the very last item I get, and scales way better end game than Bloodthirster since the weakness of Lee Sin is killing tanks. If you wanted to make a build like Spirit Visage + Bloodthirster instead of Wriggle's that is fine too. But endgame Madred's Bloodrazor is MUCH better than Bloodthirster. You don't need burst damage since you should be able to annihilate AD/AP carries WITHOUT the Bloodrazor, getting the Bloodthirster is just redundant damage and doesn't help you kill tanks more than a Bloodrazor. As stated earlier, the odds of you actually getting to the point where you need to build EITHER item as your final item is slim anyways.

Would recommend a Bloodthirster over Bloodrazor, even if you find yourself auto-attacking alot. His skills just scale so well off of AD I feel a Bloodrazor wouldn't compliment his skillset as well.

Ahh well I upvoted so dont complain :P still nice work

Madred's Bloodrazor is what I get at about 50 minutes into the game and is the very last item I buy. It is a very good replacement at that point in the game because I find myself auto attacking very often. It gives you the ability to take down tanks quickly and does well with his passive. I have honestly only gotten this item once (usually games end before I am able to complete the build). And the result was me soloing baron and then getting a quadra kill by myself. It is rather unorthodox, but if you are in the stage of the game where you are tanky and are not focused, try buying it.

+1 the only thing I would suggest is that I don't like Bloodrazors on Lee Sin as he's more of short burst and less constant autoattack.