For get kills with shaco the only u need is atck from behind. Why? because ur passive give an additional damage if u atck from behind.
The convination of infinity edge and trinity force make ur deceive hit a lot.
when u have to go away just put a jax in box in front of u and two_shiv in ur enemy, if u have deceive use it but dnt run away in front of our enemy run behind our enemy.

u start buildin boots of mobility: u buy this boots for run and kill if u see ur enemy is going and low hp u just use ghost and follow him, if he enter to base or tower use Tho_shiv or hallucinate( to control ur clone hold Alt and right click ).
then i buy wriggles lantern for life style its very useful when u are low hp just use decieve behind ur enemy ( if he have half hp).
when im buildin trinity i build first sheen couse his unique. a good way to use sheen is use deceive and go from behind!.
when i finish trinity i build warmog`s and go to jungle! how u are atck speed and life steal kill in jungle is not a bad choice.
then i build infinity edge and follow with black cleaver.
when i have all this i sell wriggles lantern and build bloodthirster ( u can build when u have warmog`s too).

at start u use ur jack in box for everything u have to put it in bushes or in middle of minions.
if u are junglin put behind jungle creep the jack in box and then u start atck him.
the best rune for shaco are red ( in 5v5) green and white (3v3)
when u got lvl 8 u can kill dragon alone usin ur ulti like tank and jax in box for carry.