Shaco Runes explained
There's one set of runes for Shaco on patch
11.8
that is the clear favorite for LoL players and pros alike. The best Shaco Runes on the position 
Jungle are Domination as the primary path and
Sorcery as the secondary path with a pick rate of 95%. Besides runes you should take a look on Shaco Build and if you are interested in pro matches take a look at Shaco Probuilds. If you want to discuss
Shaco then you should visit the champion subreddit.
Primary path on Shaco
Domination improves burst damage and assassination tools on Shaco. Most of high elo players – and our LoL pros in the the major regions – have agreed that
Hail of Blades is the best keystone rune to run on
Shaco. This keystone rune helps you to win short damage trades in your lane by increasing your attackspeed at the beginning of a fight. This is usually followed up by taking
Sudden Impact,
Eyeball Collection and
Relentless Hunter.
Sudden Impact increases your damage after dashing or being invisible. This is due to how easy it is to activate on Shaco with the amount of ways he has to dash, jump or going invisible. The additional lethality helps to take down the priority targets that much easier.
Eyeball Collection is next up. This grants the user additional damage with every killing they score.
Relentless Hunter increases your movement speed out of combat due to every unique champion takedown.
Secondary path on Shaco
When it comes to your secondary path, most
Shaco players prefer to go with
Sorcery.
Sorcery empoweres abilities of Shaco and increases the available champion resources. On the
Sorcery path, the best runes for Shaco are
Gathering Storm and
Absolute Focus.
Gathering Storm increases your late game power.
Absolute Focus grants additional damage while Shaco is alomst full health.