I went pretty in depth on summoner spells in the build section, to sum it up Shaco doesnt have great ways to stay on you with this build, choose summoner spells accordingly.

Choose any combination of those items and it should work out good for you (of course you'll need a jungle item though.)

So for the core build I have every single on hit item, maybe this is a little overkill you might think. If you'd like to take a different item than every on hit item I'd recommend picking from the "Additional Item Choices", you're going to need one item from them anyway since there are only four on-hit items. Now for the advantages of each addition item: Blood Thrister + All On-Hit Items gives you the power to solo Baron rather fast - Ravenous Hydra helps with your awful wave clear - Frozen Mallet gives you the ability to actually stick to someone - Guardian Angel is a good choice for if youre the solo carry and really need to live - Trinity Force gives you a bit more burst at the beginning of a fight while your damage gradually increases with Rageblade.

You always have the option to take E level two if you want its just preference, other than that most abilities are pretty set in stone for Shaco.

Surpassing the attack speed limit with lethal tempo is really nice and you'll feel its impact later on. As fara s the rune stats go take either the armor or magic resist in the final tree based on matchup.

Heres a clip of the build in action: https://www.youtube.com/watch?v=fvcx_rVsqlI
it's power late game is pretty insane as you can see.

The build is worse than lethality Shaco, but that doesn't mean you cant try to have fun with it. I enjoyed my time playing with this build and I think you'll have fun messing around with it if you try it out as well.