New shaco guide for you here and its for season 7 and the pre season. things may change due to it being preseason but ive tried this a few times and it works quite well.

Runes are pretty basic, armor, mr, attack speed, and attack damage. The only thing is I add one mark of crit damage because lets be honest, shaco's new crit chance is ****.

The masteries aren't accurate due to them not being updated but everything that I have is what I use theyre just called different things. I chose thunderlords because it scales off of ad and ap.

THIS BUILD IS VERY EXPENSIVE I dislike how much it costs so I don't rush draktharr until late game. priorities are jg item for farm and damage, yommu's for cdr, and hextec for that godly amazing burst damage

For jg I start at the blue buff since it spawns first. I start to put boxes down at around 37 seconds. stack three at the blue buff and after that one near gromp. take advantage of backstab and run behind all the monsters when possible. after gromp, clear the wolves and either gank a lane or run all the way to red buff. try to gank as soon as possible to get the gold for your expensive build. Buy a poacher's dirk and a jg item on your first back in if you have enough buy some boots. Don't bother with chickens or the rock monsters until around level 5 or 6 because they take too long to clear.