Hi I am, Mautu and I climbed from silver 3 to plat 5 by mostly playing Rengar. After season 4 was over I was still trying to find MY champ. A champ I would enjoy and fit my play-style, so then I found Rengar. After 3 or 4 months of playing him I think I have hit my peak for Rengar and I haven't seen anyone make any builds or even play Rengar in the jungle anymore. I remember in season 4 the build for Rengar was Feral flare, in my opinion that slowed him down in his early game. When the jungle changes came in, I adapted well to it as Rengar but it took time to find the right jungle items and jungle pathing for him. So I made this guide to share my knowledge with Rengar to others so I hope this helps for new Rengar players! :)

I take cdr glyphs because its helpful for Rengar's early game and to get his ferocity stacks up fast
I take Life steal quints because it helps Rengar sustain in the jungle, it really helps his early game.

Pros:

- doesn't use mana

- Fun to play

- Sustain

- He ONE SHOTS PEOPLE

- HES A CAT!!!!

- Has cc

- Can be built as a tank or a hyper carry

- Very high snowball potential

- one of the few champs that can go invisible


Cons:

- One Dimensional

- not much sustain

- can easily get behind in games

- Pink wards is his kryptonite.

- little cc

- he is a cat

Play Video (credit to Trippledidao for making this video) This clip should give you an idea on what creative things Rengar can synergize with other champs. Like the, Orianna ball on Rengar as he ults.

That is the range on his jump. You would want to abuse that passive by last hitting minions by jumping from the bush. Then when you have full ferocity use your q to harrass your opponent. When you hit level 6 make sure to have full ferocity stacks and push the minion wave so you can roam to mid lane or bot.

The red dot means Starting camp. Make sure to smite Golems or Gromps as soon as they spawn so you can get a lower cool down to smite your Blue/Red buff.

The Purple and Orange color represent the bushes in lane.

The White lines represent the path Rengar should take.

Blue Side
Golems > Red camp > Wolves > Blue Buff


Red Side
Gromp > Blue Camp > Wolves > Red Buff

One thing I notice whenever I see Rengar players do with his stacks is, whenever they get full Ferocity stacks they just blow it right away when they're killing creeps. When It reaches full stacks you should save it for ganking with his E-Bola! (I'm so sorry, bad joke :D).

Saving the max Ferocity stacks (empowered) is crucial.

Play Video
Credit to - I3imbi

What he did was he used his Empowered E as he leaped mid-air to snare his targets. This is one of the most important tricks you should learn if you are ganking with Rengar.

Cool Tricks you can do with Rengar: Play Video Credit to - Aranae
Play Video
Credit to - Teemu

Flash - This spell is a must have on Rengar, without it you are useless
Ignite - Ignite is really good to secure yourself a kill to start snowballing. Overall you should take ignite to add that pressure to your opponent.
Smite - Of course you should take this if you are jungle, what kind of troll do you think you are?
Exhaust - I would usually take exhaust on big late game champs like Nasus, Riven, Irelia, Pantheon, Fiora, Hecarim, etc.
Cleanse - Take cleanse on high cc champs that would lock you down and F*** you (Lissandra) And by the way, Cleanse does NOT work on SUPRESSESS I learned it the hard way
Teleport - Ah Teleport, such a conformist summoner spell. I personally do not like teleport on Rengar because I feel as if it's not that important on him. But if you want to take it on him go right ahead for the ult+tp.