I know this build may seem a bit wierd, but personally I find it really good.

First i get that Wriggle's Lantern. I think its great for early dragon, and just for vlering jungle and minions. The lifesteal and the free ward is really helpfull as well.
Early game i try to get as many ganks as possible. I usually start after clearing jungle once. Or whenever it is needed.

Frozen Mallet, Giants Belt, Banshee's Veil?
I have tryed playing Shaco as almost pure DPS. I don't find this very good, since I usually get bursted down in a couple of seconds, even if i w8 for the AP nukers to go all out and everything. Therefore I like having theese survival items. Froxen mallets slow is godlike as well.
Sometimes i get Atma's before that Giant's Belt. I still find shacos dmg good, and for me, this build is the best.
The other items will sometimes have to be switched around and such.
Obciously it depends on the enemy teams setup and so on.

Meow.