THIS GUIDE MIGHT LOOK BORING BECAUSE OF NO PICTURES!
READ IT PLEASE!
IM VERY SERIOUS ABOUT THIS PLAYSTYLE AND IT'S NOT A TROLL BUILD!
YOU WILL LAUGH SO MUCH READING THIS THINKING ABOUT ALL ADC 1SHOTS YOU WILL GET!
TAKE THE TIME TO READ IT I PROMISE YOU IT WILL MAKE YOU WANT TO TRY OUT THIS BUILD!

Read the notes I've made about the items. Just hover over the little thing that says "Notes" over the different item sets and you will get a popup. The text there will explain alot about why I build like I build!

VERY IMPORTANT FACTS!

Well this guide goes through a way of playing Rengar that in my opinion the most fun way to play. It's focused on being able to 1shot the enemy adc very easily and the most important factor, FAST! I put in a lot of movement speed in this build because of a reason. I know that you too want to jump in and kill someone fast and be able to run away without anyone being able to catch you.

Rengar: "Just passin' by!"

Smite in my opinion is not worth it to be able to do what we want. We use exhaust instead to be able to get a early kill in top or mid. The early kill is important because if you don't get it you won't be able to get as strong as you want to be able to kill their ADC as fast as you should. You don't need to get a early kill but it helps and Exhause helps you to get it even easier.

Some think smite is needed but no. We don't want the jungle item because we don't need it's stats and your job is to kill enemies to get strong so you don't need to fast as much as other jungles. You will have such a easy time in the jungle late game so you won't even need it then so that's why you should go without smite and have a lil rough time in the start but a awesome one in the end because Exhause will help throughout the whole game.

We want to be able to jump, kill, run. This is a "Kill n' Run" playstyle. We have all this movement speed because it will make you feel great and also annoy the heck out of the enemies because they don't know how to kill you when you 1shot and run.

What we combine to do all this is:
-Runes
-Ghost
-Movement Boots
-Ghostblade
-Ultimate
-Masteries

All of these give the result of what I call: "Rengar the Dank Engine"
You jump in, Kill the enemy, Run away from there just like a Train. You run over the ADC kinda and then don't give a damn running away from there like a boss.

Cool guys don't look at explosion correct? ;)

You will start wherever you feel like. Usually bot side to get that sweet leech. Run to the top side and grab the other buff. You will be quite low after this because of no smite. Then either do a cheeky gank on top if the enemy is pushing and you have enough health. If not then move on to the River Turtle and kill that for some hp and cash. If you can't find a gank top or mid after that move on to the enemy buff on the top side to steal it and maybe get a kill. You do this by standing in a bush on the other side of the camp and having the camp warded so you can smite over the wall and if the enemy is low get a easy kill on him.

Later on in the game just farm and try to rank a lot to get your passive going. Remember that your only goal is to 1shot the ads and run like a chicken afterwards. :)