Shaco is one champion good for ganks and for invade, abuse of this.

You pick Eletrocute for Early game pression, for snowball, abuse of this for try put pression in the game.

The "Example Build" is maked for ignore armor items in squish champions and burst all incluing tanks (Tanks dont take insta-kill but you do one good damage).

Up the Q To lvl3 for 3Sec invisibility for one good engage, and maxime E in the first for explode the enemies and do more slow.

Shaco is one good champion for try steal objectives, in baron/drake use the W for give vision. In fights break the enemy wards for one stealth engage for one good pick off, after pick off use R for gain one "immunity" for 2secs and try escape.

Pros: Good Early game, Semi easy control of objectives, good invades, good 1v1/pick-off in early and late game.
Cons: After lvl3 Of Q is very hard for gank, much low time invisible, and dont have much cc, have just the box and more nothing, easy to counter your pick-off, very squish.

In First camps use 2 box for make Red and the other 2 put in the krugues, before tiamat shaco not is too good for make jungle camps, but after tiamat you melt the jungle camps, after tiamat abuse for try invade and pick-off.

Wait for the tank of your team do engage, and the enemies use the skills/spells for you enter and do one good job in fights, if your team dont have tank, make off-tank build with titanic, trinity, sterak.