This is my first guid. I love playing renekton and i revised my build of him. I think its pretty good, let me know what you guyus think. Ok. Scroll down.

For Boots, I prefer Ionian Boots of Ludicidy. If you want more attack speed then get Berserker's Greaves. Depending on your role you can get any boots that fit the situation.

I like getting The Brutalizer after boots because it gives you a good bit of AD, CDR, and Armor Penatration for such an early stage. I get this item to upgrade later to Youmuu's Ghostblade. If you dont plan on getting Ghostblade, then dont waist the money on The Brutalizer.

Next get Phage. This is good because it gives health, damage, and a chance to slow the target. I like to upgrade it into Frozen Mallet. Some players like to get Trinity Force instead. I think the sheen is useless and the zeal buff is insignificant.

Next is Warmog's Armor. If you want to go more ADS then Offtank, then get Infinity Edge instead.

Upgrade your Brutalizer into a Ghostblade. Now, if you want more AD get a Bloodthirster next. If your team needs a tank, or if you're dieing to quickly, upgrade your Phage into a Frozen Mallet.

If you haven't gotten your Bloodthirster yet get it now.

Here is where you make a choice. You can get any Attack speed item you want now. I would personaly get a Black Cleaver, or a Phantom Dancer. Getting Medred's Bloodrazor is a great choice if you can afford it.

Usefull Items include:
For more AD
Atma's Impaler
Last Whisper
Infinity Edge
For more MR
Wit's End
Maw of Malmortius
For overall survivability
Guardian Angel

I like using Flash and Ignite on Renekton. Flash is a quick escape and a quick jump at the enemy. Ignite is good early game and gives you additional AD wile of cool down with this mastery page.

Ghost is a good spell for chasing or running.

Exhaust is great for targeting a champion and keeping them from running.

I wouldn't use any other spells on Renekton other than cleanse, but only if you are going full tank or you notice you are getting focused every game.

Max out your W first. It gives you two free swings when under 50 rage and stuns enemies.

Interchange when maxing out your Q and E. If you need more health more frequently, max it right after your W, otherwise, just alternate.

Put points into your R whenever you can. Why? It's your Ultamite, why not?

Well, there is my build. Please give me some feed back so i can make this build better. Now go and try this build out. :D