Build Items in order: Hextech GLP then ZZrot. I usually max W then rotate between Q slightly more than E.
Use ZZROT to push and bait, constantly setting up boxes around the portal. (Enemy will either 1. Have to let the Voidlings push, 2. Try to destroy it taking damage from boxes, or 3. Waste wards, Trinket adn time going to lane)
After you get core items of Hextech GLP and ZZrot, building third item of Liandries is a huge power spike. The Deathfire Touch Mastery is too good to not be used on this Shaco build since boxes will continually do damage when placed right and there is no cooldown like Thunderlords. Although I didn't write a lot please try this build, you won't regret.