This build works in so many ways that normally you wouldn't even need any situational items at all, Your 1st power spike is Warrior blue smite and Greaves. This is really good because as Shaco you're normally ahead of the other jungler unless its Master Yi or Vi, your AD damage is amazing with your backstab crits (all I'm saying is that you do alot of damage).
Your 2nd power spike is either Black Cleaver + B.F sword or Black Cleaver + Infinity Edge, it'll mostly be Black Cleaver and Infinity Edge because the damage you output to anyone at this point is so deadly including Tanks like Garen, Darius, Zac, Thresh, etc.
The Infinity Edge multiplies your base damage by however ?% into almost 2-3 fold depending if you get a backstab or not.
Your last power spike is Dusk Blade as it builds into your kits Q and does 200% lethality damage + 75 which is amazing damage.
Now, sometimes your team comp isn't very good and you don't have a front line that is why you buy Guardian Angel for Maximum survivability when you die you can Q + flash or just Q in itself, thats why this build is so amazing, so many games I've carried 15-20+ kills each time unless we have a crazy fed carry.