Here is a build that everyone will love lol.
most people think that shaco isn't that good anymore since the mass nerfs he has gotten.
I'm here to tell you all THAT ISN'T TRUE.

Try this build and you will love it i promise you that.

Start with the boots of swiftness and 3 health pots. get to the blue pill as fast as you can you need to have 1 Jak in the box down by time it ways (Welcome to Summoners rift) place 5. if there is a jungler on your team. Well they r going to have to get over it cause you want as much time with the blue pill as you can.

OK get to the lane you are in as fat as you can. by now you should have 1 point in (Jak in the box) and 1 point in (Two shiv poison). try to place as many JitB as you can when someone gets close shiv them if they r low try to kill them. Ks is all shaco is about start game so get all the kills you can.

you should b lvl 4 by time you recall unless you get to greedy. Also by now you should have 1 point in JinB 2 points in Shiv and 1 point in Deceive. you need to buy your boot of mobility and a Long sword. now its time to start GANKING people. look for someone with low health or is squishy then go for them and tell everyone so they can let them over extend. Go threw the jungle its faster and less likely they will know unless they warded it. Try to get 3 or more kills b4 you recall again.

OK this time back you need to get Sword of the occult and zeal. Then just keep doing this until you r fed as you can b but don't go alone and let someone else go first (unless they have one shot worth of health). Just remember you jump in then shiv ((((ALWAYS)))).

Next time you go back you need to have at-least 2000-4000 gold to spend then get as much of this gear as you can. You need to get (Cloak of agility) and (phantom dancer) as quickly as possible. After you get that try to get another 2000-5000 gold for the (infinity edge) and to start working on (Bloodthirster). After you get your (Bloodthirster) just feed it on neutral camps and lane minions. By time you get that fed a team fight should be either going on or about to be. Get in there and go for whoever has the lowest health (EX. Miss Fortune, Morgana. exc.) After a good team fight farm a little more on the way to there bass as much as possible (there will b people that farm better so do your best) that means every minion you see you should try to kill. Only ever use your ult if you are attacking a tower or if need to get away fast or cant get away. Your clone will kill people a lot when it blows up. So if you know you r going to die then use your ult if you can to help your team kill the rest of the apposing team.

The Runs you need to get are very much need since this build is really more of a crit damage shaco. Marks need to be armor pin. the quintessence armor pin. more armor but harder crits

Tips:
1) Deceive, Hit, Shiv, Ignite (FAST), stay behind them if possible.
2) Jungle if you need fast cash.
3) Jak in the box it up = Meaning: only put a jak in the box in places to get away so try to prep a lot.
4) Keep the jungle pills on you if you can.
5) be a scout for your team. (Reminder:(1)As Shaco you can Deceive over tree lines and bass walls do this if you r running. (2) when running for your life most people don't think that shaco can deceive behind them and run the other way to got a quick recall.)
6) Champions that work with shaco (ANYONE WITH A STUN LOL)
Final Tip 7) THINK LIKE AN ASSASSIN BE SNEAKY.