If you want to be a pure Ad Shaco try this build and see the results.
First i take Dorans Blade becouse it geives you health and attack damage and its a great start.And after i take Berserker Greaves i buy Sheen.Why?Becouse the mana and becouse its passive.That passive helps you a lot if you use ad shaco.After that i take only pure damage with critical chance and attack speed and others.
For runes as you see i use armor penetration runes to deal more damage to tanks, i use vitality runes so i can have a little bit of health bonus and i use critical strike runes.

So first max out your decive ability and whenever you have it use clever against your oponents.Do not use it to attack him normally try using it to teleport behind him so you can deal the bonus damage that shacos passive offers.
The same with Hallucination, try putting your clone behind your target so you can deal the bonus damage.
Keep Two shiv Poison to slow your target or to do the final hit.
If you cant beat your oponent, go in the bush, use a Jack in a box and wait for him.Then he will be feared and you will have the cnache to kill him.
If an enemy escapes and he has less health but you cannot kill him becouse your very hurt do not turret dive.Go into a bush, use Hallucination and send your clone using Alt key to the oponent. He will think that you turret dived and will attack your clone. When your clone will die he will die too becouse of the clones passive.
This is everything I can say about Shaco.