Shaco is an amazing carry for your team. Now a lot of people say he's supposed to be in the jungle but I prefer to play him in lane. For Shaco to be really effective be sure to lane with someone who has a snare or a slow and remember your Jack in the box is not there to deal damage it's there for the fear and chaos it can create in a team fight. Also beware of oracle's elixirs they are your worst enemy if the enemy team is smart and 8/10 times they won't be but if they see you are doing good they will invest into an oracle's to try to make the match hell for you. Ask your teammates to assist you in taking down the person who has oracles and make them pay for wasting 400 gold.