Early:you have onlly to spam that e on the enemy,and play verry agressive dont let them farm and if they come to you run adn e them
Midgame and late game:wait to find the adc q one/2 hitkillhim then w+r and wiat for your q cd then you cna select if you continue fight or run and wait for another oportunity

Shaco is not a normal pick on rank so picking him first may influence the enemy jungler champion chose EX:the enemy jungle wants to take amumu but you pick shaco shaco jungle will make amumu useless if he plays agressive so he ll take another champ ex:lee,rek;like this you ll give your jungler the oportunity to think about it
Shaco toplane can roam really easy and can surprise the enemy.
EX:you fight tp with your oponent and you drop pretty low you ward a place he cant see b teleport on ward and come back with q the enemy wont expect this happening and you can make a easy kill

Roaming:The best way to do this is to go through your jungle q right before enemy can see you go to his back w and start to slaughter him why through your jungler?Because shaco is all about the surprise :)

Teamfight:As i said shaco has to find the adc but dont be blind when you do this wait for him to be split from the enemy so you can also place a w and ult before they can reaction,like this they wont be able to kill you and you ll still make some dmg before runing/going for a low hp target(probably the midlaner)

Solobaron and Ancinent dragon:Ye shaco will solo those 2 beasts with this build at the final so your team can push and you can take those nice buffs.