Hi, this is my first build.. And this is a build to a AP shaco.
Its not ment to be like a one vs one fighter, more like a supporter.
I've made this build, because i like playing him ability power, and i have never really seen a build i wanted to play.
But, dont like spam me with, your english is so bad. I know it, and i'm not here because i want to have credit on my english.

Please, read the whole guide, before you rate it, and comment it. its a very fun build, when you first gets really good at using your abilities.

They say that death isn't funny. It isn't, unless you're Shaco. He is Valoran's first fully-functioning homicidal comic; he jests until someone dies, and then he laughs. The figure that has come to be known as the Demon Jester is an enigma. No one still alive knows from whence he came. There are rumors, but one must not speak of them too loudly lest Shaco come to jest. It seems unimaginable that such a threatening figure would be allowed to remain at large. There are those that believe he is an assassin for hire, left to roam until he is needed. Others believe that Shaco is simply too clever, evading authorities at every turn. Still others believe that he is the demonic manifestation of humanity's dark urges, and therefore cannot be stopped.

''Whatever you do, don't tell him you missed the punch line.''

I have chosen those runes I've showed, because, the AP shaco easily runs low on mana. So flat mana is a good choice, since it's most in the lower lvl's he runs low on mana very fast. You don't have to use these runes, just do what you want, but they will be my personal choice.

I'm taking the masteries i do, because i need the damage, and then i also needs the extra exhaust time, and the reduction of my targets magic resist. And then i always can use a little extra AP when i have used my Ignite. Its really good at low lvl. The two summoner spells together is really cool, you slew em down, and deal extra damage all the time, and the ignite is always a good finisher.

My to favorite summoner spells is Exhaust And Ignite because, Exhaust will help you gank, and the ignite, will make the kills come to you much easier.
You could grap, Ghost or Flash, but i usually take Exhaust and Ignite.

As i said with the runes, do what you want with the masteries and summoner spells to, these masteries and spells, are just my personal choices.

I start buy a Amplyfing tome and then goes for a Sheen, i need the damage after my spells in the low lvl's. After that i'll go for my Boots of Mobility, because i need that "mobility", to already in low lvl's, gank and escape, and running from lane to lane. And then, if im doing good, ill grap a Mejai's Soulstealer as early in the game, so i can get my stacks up fast. And then, ill build a Rylai's Scepter, because, it gives me good ganking and escaping abilities. Then after that ill go for a Lich Bane, so i can make huge damage output, and it should really improve you abilities to gank, and make even more insane damage. And as the last item i'll grap my Rabadon's Deathcap. It will make my damage even more insane then after the Lich Bane. If you follow this, and have the skills you will be like.... WOW :D!
I have let the last spot open for your own ideas, mabey the last item could be a Deathfire Grasp, if there is a good tank on the enemy team.

Deceive - Shaco stealths himself instantly and teleports to target location. His next attack is guaranteed to critically strike.
Shaco instantly stealths for 3.5 seconds, and teleports to target nearby location. If he attacks while stealthed, the attack is guaranteed to crit for 40/60/80/100/120% bonus physical damage.
Cost
90/80/70/60/50 Mana
Range
25000

Decive I use my decive to gank, escape, check out people, and chase. You can also use it, to surprise a enemy with low HP, trying teleport back. Its great to escape, you can kinda jump over a wall, or go into a bush, and decive out away from the enemies. Its also great to setup ganks, because, you can decive behind an enemy, and then use your Two-shiv Poison.

Jack In The Box - Shaco creates an animated Jack-in-the-Box at target location, which will wait, stealthed, to Fear nearby units and attack them when some come nearby.
Shaco creates a Jack in the Box at the target location. It will Stealth after 2 seconds, and pop out when an enemy comes near, fearing nearby enemies for 0.5/0.75/1/1.25/1.5 seconds and attacking them.

Its attacks deal 35/55/75/95/115 (+0.25) magic damage and it lasts for 90 seconds while stealthed or 5 seconds while firing.
Cost
50/55/60/65/70 Mana
Range
400

Jack in the Box Im using my JITB's to fear my enemy, and make and easy gank. you can also use em' to hold an eye on people, so you will not be ganked. Its also a great idea to stack your JITB's in a bush. Its a low-lvl easykill.

Two-Shiv Poison - Shaco's Shivs passively poison targets on hit, slowing them and applying a miss chance to minions. He can throw his Shivs to deal damage and poison the target.
Passive: Shaco's attacks poison his target, reducing their movement speed. If the target is a minion, it reduces their chance to hit by 20/22.5/25/27.5/30% for 2 seconds.

Active: Deals 40/80/120/160/200 (1+) magic damage to target enemy, and poisons them for 3 seconds. Upon activating this ability the passive is removed until Two-Shiv Poison becomes available again.
Cost
50/55/60/65/70 Mana
Range
625

Two-shiv Poison I use this ability to harrash, chase, and its good at harrashing your enemies if you are builded AP, because its the biggest damage output you have. As i said i use it to chase, and its really good at it, because of its long range, and slow ability. And when you first have the Rylai's its even better at it.

Hallucinate - Shaco creates an illusion of himself near him, which can attack nearby enemies. (Deals half damage to turrets.) Upon death, it explodes, dealing damage to nearby enemies.
Shaco creates an illusion of himself nearby, which deals 75% of Shaco's damage and receives 150/150/150% increased damage. (Deals half damage to turrets.) On death, the illusion deals 300/450/600 (+1) magic damage to nearby enemies.

Lasts up to 18 seconds.
Cost
100/100/100 Mana
Range
500

Halluacinate I only use this to towerdive, and send into big groups of enemies. Again, when you are AP shaco, this clone can deal very insane damage. Its also possible to use it when you want to flee from an enemy, just clone, and decive. And then you should be able to run away because of your boots of mobility.

In this build your job is to harrash, and take insane HP from the enemie, with your Two-shiv poison, and then you can lay Jack in the box, in the team-fights, always in the middle of a fight. It will sometimes turn the whole fight. You can also make a really cool trick, where you get one from the enemy team to chase you, into one of your JITB's in a bush, where whole your team is waiting for a really nice gank. You will also be able to help your team to catch the enemies. if someone is running away.. just decive, and cast a Two-shiv poison, and then the kill should be like a piece of cake.

I will say that the shaco using my build's Unique skills would be to slow down enemies, setup great ganks, and make a lot of damage. Do a towerdive, without taking any damage. You would also be one of the best harrashers on your team, if not the best.

I would just say, GL & HF. :D Try not to be to overpowered with my build :D