League of Legends (LoL) Question: Optimal Rengar build?

Feral Flare of Spirit of the Elder Lizard decesion really comes down too, am I going to have the luxury of farming my jungle this game? If not Spirit gives you more damage short term that will help you snowball. I have tried various Rengar builds and I still think full damage early to mid game and bruiser late game is the best way to go. Ravenous Hydra in my opinion is a must! It helps your clears, helps your pushing, and makes it extremely easy to pop the squish, which is what your made to do!

This is just a general idea tho and sometimes you will need to go full CDR Tank and other times you need to go Full AD **** your face awesome sauce, just be the judge of the best time to do that. ^.^ hope that helped

As many Doran's Blade's as possible