THIS GUIDE IS LONG FROM FINISHED. I AM JUST RECORDING MY OWN PROGRESS HERE AND TO SHOW YOU GUYS JUNGLE RENEKTON IS PRETTY VIABLE.

Alligator, needs to be in the jungle and a river. 'Nuff said.

I am not completely sure about the runes yet. Still in test phase.

Renekton needs some extra health, with Frozen Mallet he gains a lot but not enough. So get those extra runes for some extra beefiness late game. CDR runes to get those abilities usable when you want to use them and MS to be that chaser. Some extra damage is always nice.

Damage and protection from those minions so you are not instant death at your first gank. You can also exchange them for the extra magic resist / armor if you feel like too.

The items are the best part.

You start of with cloth armor and 5 pots. Take the jungle route, see below. After blue you have used all your pots and you are around 60-70% health. Ganking time, see below. Then go base and if you got a kill or assist buy towards Wriggle Lantern. Whatever you do, get your boots on your first recall so your jungling gets a lot quicker.

After Wriggle you're good to pick your boots, depends on the enemy team. Choose wisely, you know the drill.

Build towards Brutalizer. It lowers your CD and damage and penetration. Brutal(izer). After Brutalizer build toward an Avarice Blade but keep it there. It generates some gold so you can build your Phage nice and quick. When you got your Phage, get Ghostblade. After Ghostblade get Frozen Mallet, you need the health now and the slows.

Wit's End, why? Magic Resist plus attack speed. Imagine a team fight. You are somewhat low on your MR so you dice in, hit W on an enemy. Boom, without fury you are around 500 dmg plus 80 magic damage ahead while you are buffing yourself. Now because of your amazing attack speed due to Wit's end and your activated Ghostblade you got those stacks in no time. This also counts for your Cleaver, it debuffs your enemy so fast with your W he's instantly scared at how much your Furied Q damages him.

End with a Bloodthirster in exchange for your Lantern to get some more damage and keep the lifesteal.

You need all three of your abilities to kill but you need to empower your Q to survive.
R>Q>W>E. Easy.

Ghost and smite. Ghost to be insanely fast in your gank, smite for the jungle.

Red --> Wraiths --> Wolves --> Blue (grant it to your mid but stick around for XP) --> Gank top --> Base --> Golems --> Wraiths --> Wolves --> Rinse and repeat.

Use your Q only when your fury bar is red. Way more damage and the heal is way better. Also use your Q in jungling only when it is red.

PS. Use your Q to net those kills.

Use your W to fill up your fury bar. And to stun of course.

Use your E to get close... Or get away.

Use your R asap. Some people use it to turnover the fight but IMO that does not work. Just pop it when you are close to your enemy to get that DPS going. The only time you could use it not for damage is when you really need to escape.

Long from finished, just want to show the world Jungle Rene is pretty awesome.