Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
The illuminati shaco play style as probably most of you know is created by pinkward.
I just designed a build that fits better to my personal runes for him (mostly because i don't have any CDR runes).
And in my opinion this this is a build that enhances Shaco as a team fighter and laner
1. If an enemy runs into an illuminati trap and tries run away, to avoid the damage, it's easy to just use your shiv which will also trigger Rylai's Crystal Scepters passive, for a double slow effect. Making the boxes hurt more
2. And the Zeke's will obliviously help in teamfights (because of its passive), give some extra tankyness and give the increased CDR which i mentioned earlier.