I played this build in twisted treeline on the top lane and it is really fun. Got a 9/0/6 score.
It's my first try for making a build, so please give me advice, if something is wrong.

I take always tankrunes for more durabillity starting in early game because it was at first the only full runepage i got, then it was always fun to play a bit more tanky.
Additionally you can use other tankrunes or runes for an AP.

the reason of my choice of the Masteries are the same like the runechoice. Altenatives are of course Mana and mana regen + AP in offense.

I start alsways with a doran's Ring for more health and more AP, then I get boots of speed for more speed. Then I build Will of the Acient for Spellvamp and AP, then i finish my sorcerer boots for more damege with my spells. Then i take an Archangelstaff for more Mana. Then I take a Thormail for more durability. Then I get an abyssal scepter for Magicresist and the debuff-aura. Then I take a Rabbadons for more AP.

If there aren't much AP or AD you could replace the Abyssal Scepter/Thornmail with Voidstaff.
If you don't have to play the tank you could replace both defensive items with Voidstaff and either Rod of Ages or Rylais crystal scepter.

I take rupture first and max it first because its Chos major damage spell and you gain a bit more lane controll, if the opponents champions are walking in it. You can also use it to chase champs or to get rid of champs, that are chasing you.

When jungling with Cho, I start with Vorpal spikes for more autoattack damage. on lv 2 I take rupture for better ganking. I skill Vorpal Spikes until i'm lv 5, then i max Rupture and Feral Scream.

Don't forget to eat low life champs/Dragons/Barons they're yummy.

I take Flash a savespell and Ignite or Exhaust, or Flash and Smite for jungling.
Exhaust and Ingnite are both good for Cho, so take the spell, which you can better work with.

Try to support you team with rupture inorder to grant/stop a chase and feral scream to silence in the right moment.

First try to make a build so give me some advice, which I can make better.