Shaco wants to end the game as quickly as possible, a lot of shacos run ignite for lvl 2 cheese invades/ganks.. But its so well known that the chances of you being successful with it are lower than before. Albeit if you are low enough rank you can probably still get away with it. Your job with Shaco should be to gank as often as you can.. Like Lee Sin pressure or more. You have to use ur Q to your advantage to do ganks that most junglers cant pull off.
If you get the lead, you want to keep it.. Apply pressure where its needed, split pushing, or trying to blow up their ADC in a team fight. Generally its pretty hard to blow up an ADC in a team fight with Shaco atm, so generally you split push and then do clean up duty as the team fight comes to an end.