NEVER EVER GET PHILO STONE ON RENEKTON! He doesn't need the gold per 5 at all. He solos top and gets kills easily early game, making him have almost no need for the gold per 5 from philo stone. Mana regen is useless, and he doesnt have trouble with health that much. Just use regrowth pendant for Force of Nature. You should really try out Atma's Impaler+ Warmog's Armor combo it so effective on renekton. Just try it and incorporate it into you AD heavy enemy team build, or even your main build if you like it. Also Thornmail isn't very effective unless they have a Tryndamere 2 shotting everyone. Also get a 7th item, Wriggle's Lantern starts to fall off late game, so it's better to get something to replace it late game.

Done a ton of rebuilding, 2 new build's added. please take a look ;)

Looking at this guide again, I can see some major improvements. However there is still room for improvement. Getting 24 on offensive tree isn't really that good. You can move 3 points in Alacrity to the defensive tree, because attack speed is almost useless on Renekton. 21/9/0, 0/9/21, or 15/0/15 are the usual mastery set up for renekton. Add a section on situational items because you won't always be able to build the things you want. Example if the enemy has a lot of magic damage then a Force of Nature would be better than Randuin's Omen. +1

Thanks, i've made a new section for that, check it out :)

Thanks, it really improved my guide, check it out any time soon see if its easyer to read :)

Hm.... Where to start... Okay let's go with item choice. Infinity Edge, and Trinity Force are acceptable, because they do help his damage output. However a Phantom Dancer does not, he has no need for attack speed seeing how he is spell reliant, and not a auto attack champion. Add some more tanky items, Renekton needs to be able to go into the middle of fights take some damage kill their carry and get out. The extra hp for your ultimate helps, but won't make you indestructible. You should add a section for your situational items, and add coding and color. Also you should follow Icecreamy's advice.

I don't play Renekton myself, just randomly clicked here :P

Anyways you should take a look at the first link in my signature, it will make your guide look so much better :)