U start by putting one box at YOUR wolves and the rest at blue. You want to clear those buffs asap so you can counter-jungle HARDCOREEEEEEEEEEEEEEEEEEEEEE. But when you're at their red, put a boxes in the bush and wait for them. Once they're there bait them by attempting to take their red. Then you bait them into bush and FIRST BLOOD!!!!! From there you back to your own red and take it and now you've taken all the damn buffs in less than 5 mins. Before you get your red take wraiths cuz you need to wait for you smite to come back up. And when you take your first blue make sure it's a smitless blue; this allows you to smite their red. Then onwards their jungle is screwed and you win. Counter jungle him more with you're wriggles ward.

Shaco's main pro is how fast he can take his first buff (which them allows him to counter jungle). As such, when yoy get to their red, ward their wraiths so you know when they're coming to they're blue. You always want to use your starting mastery ward offensively.

I've only managed to do what i'm going to say twice but each time I did it. I always question myself about why im not in diamond right now. Here the mosty OWNAGENESSS INVADE THATS POSSIBLE:
1. Place a ward at their blue and make sure you do it without the enemy knowing and in a safe spot to teleport to.
2. Go to their red, make a rapebush in the red buff bush.
3. Even though you can clear that buff fast, get a leash from your top laner and CLEAR THAT RED FAST AS HECKKKKKKKKKK( it still has to be smiteless tho).
4. Teleport to your ward that you placed at their blue and throw in an auto attack or two on their blue and then smitesteal it.
5. Deceive out BRO.
6. GG both their friggin buffs gone in 2 mins.
Note: in season 3 ppl started doing smiteless buff kills at the beginning so you smitesteal it. BUT that means there will be more ppl to leash it so make sure you deceive out quickly.

Pros:
-Quick first buff.
-Amazing counterjungling potential.
-JUKES OPPPPPPPPPPPPPPP!
-Ganks are annoying and are one of the best too.
-Many more that i can't think of right now.
-Dive like a boss with your ult.
-Flash bait ppl with your clone by making it run away.
Cons:
-So damn squishy.
-Any type of wards counter you crazily.
-If you get stunned or rooted: expect to die.
-As awesome to play as he is, he falls of late game quite hard.
-His boxes are quite useless (but still annoying) late game