I've been playing Rengar and I have come to an Hybrid stile sometimes which is almost the same as this build.
I think it works, but you should get more health. Either by getting froz mallet if you dont go for trinity force, or something like Warmog's Armor.

I like how you said "nice", which is generally a compliment, but then downvoted the guide itself, please explain your reasoning

nice

AMAZING WENT 10-0 GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG H3H3H3HH3H3H!

Did you even take the time to try out the build? Or did you just think that it would be smart to down vote for absolutely no reason other than item choices? You cant even BBCode right! Actually READ instead of INSTA down voting, thanks :)

Hextech gunblade? Lich Bane? WTF?

Teleport is a no-no. Ignite is so much more useful, or even Exhaust

You know if you have a look at my Match History, here -http://www.lolking.net/summoner/na/26084831#history-
you will find that out of the 6 Rengar games I personally have played on the NA servers, and not the PBE, I have won half of them. If you cut out the game that I went 0-2 in, which was when my Ping was through the roof, I have won 3 out of 5, it works, why would I post a faulty build?

Hybrid Rengar... No bueno dude.. Only his W scales off of it. Triforce is way more useful on him than lichbane. Slow on it keeps people from getting away. lichbane will do nothing with your abysmal amount of ap.. so its a waste really. If you win with this build ill be suprised.