Hello guys.
i haven't been using shaco for that long but i still think it is worth your time to read my guide since i done really good games with this build.
keep in mind that this isn't a jungling shaco build so if you want to jungle
look for another build. jungling shaco can be very effective but i think he is a very good in the lane aswell.

Early game you sure do wanna get alot of last hits. so keep in mind to use shacos passived abillity (20% extra damage while attacking targets from behind) on the minions.
this will give you a bigger chance of landing a last hit on a minion wich will result in extra gold. if your enemy is trying to make you move away from the minions, hit them with two shiv poison(your E spell) in order to make them move to their turret. if they don't play a little more aggresive with the one you are laning with. if the person is playing with a ranged champion like teemo or vayne this will work very good. but do not of course play to aggresive since it can make you look stupid and make you a easy target to kill.

i don't rally have all the runes to make my rune page to be complete, but if i guess you want to have Armor penetration marks, Critical damage seals, Magic resist glyphs (you do not want to be 1 shooted by enemy champions spells durning early game) and critical damage quintessence.

im not an expert of good masteries for shaco but i think of attack damage and all these ad masteries. if you get points to use after you are done with your offense masteries get some magic resist and armor masteries. (view my at top)

at the start of the game buy boots of speed and 3 hp pots.
you want to have boots of mobility to move around the map very fast so you can gank fast.
you want you have yomuus ghost blade becuse of pretty much everything it gives you.
when you buy phantom dancer you get critt chance and critt damage on shaco is insane especilly if you use hes passive. of course the attack speed is good to but you don't need more attack speed than the amount phantom dancer gives you. you want to get infinity edge as fast as possible after that becuse you want to critt more often and have more damage. when you can afford trinity force you have proboly been in the same game for a while. trinity force is good for giving shaco alot of everything and shaco is good with pretty much everything it gives, so you will be alot more stronger with it then withour it. last item you gonna get is guardian angel becuse you don't wanna be killed while running around on the battlefield trying to gank enemys.

i use flash becuse it can give you a big advantage flashing over walls or flashing away from your enemys. i also use clarity becuse shaco drops low on mana very fast durning early game.

[pros]
jack in the box can be used as wards
incridible damage
proboly has the best escape spell in the game
EPIC DANCE
[cons]
i don't know yet >.<

DO NOT play AD shaco in mid lane....