Buy your machete and refiliable potion and go straigh to red but and start to place Jack in the box in the point where the red buff spawn, start attack the red buff and DON'T SMITE IT!!
you ill kill him record time and unlock Deceive and go staright to enemy blue buff, use your deceive to position yourself in the bush if the enemy jungle is fighting the blue buff, whait for the right moment and then smite it and attack the enmy jungler and put ignite, he you done this well he will flash and die, just run away from there if you se the enmy mid liner missing,
now you have 2 buff and you gank gank mid or go straight to raptors.

after you get enemy blue you just farm and complete your jungle item so you can gank more easly and get kill, try to avoid 2v1, don't lose too much mana and remember to keep visiting the enemy jungler, try to kill him and steal his farm, try to put pressure to enemys line by ganking them constanly, farm fast and by tiamant to fast clear.
when you gank try to put a Jack in the box to avoid enemy to escape and remember to ward your jungle because you may be inavde by someone who are angry :D

Shaco suck in teamfight you have to splitpush always, try to don't fight 1v2 and let your clone jokes the enemy, you can use your abilities to destroy towers quickly, you must have timimg and stay alive to steal dragons and baron.
keep pressure around the map, place jack in the box and ward to have vision, and use your clone to destroy towers easly.