Refillable potion
Hunter's Machete
Warding Totem

You will always want to start like this as a Shaco.
You do not need Hunter's Talisman since you will always have to start at your Blue buff

You will always need to rush your Tiamat first item for a better jungle clear, so you will need to do a lot of jungle camps early game and try to make a successful gank on one of the lanes, i mostly try to gank mid if it s not pushed out after clearing my chickens or just go after a full jungle clear gank botlane, you will usually need to buy Boots after Tiamat

You will want Boots of Swiftness first as your core item to move faster, do better ganks and also run long durations while inisible (Q).
Second is Titanic Hydra, it's not just tanky but it also deals a high amount of damage.
Sunfire cape is to gain more armor and complete your Cinder which you have alredy bought as a early game purchase.
Trinity Force is one of the werry inportant items on shaco and you want to build it fast as posible after your tiamat
The Guardian Angle is your fifth item, you will probably want to sell your Hunter's Macheti for it or keep it untill the last item Maw of Malmortius or Frozen Heart

You want to build this item if the enemys have a lot of Magic damage or have an enemie that is fed and you really need Magic Resist

You want to build this if the enemie team have a lot of Physical damage or have an enemie that is fed and you really need Armor and it helps you to stay longer in fight and you can spam your Shaco boxes (W) before teamfight to fear the enemys and deal a small damage to the enemys

https://gyazo.com/d71e3033be3206f042d8cf587dfd888e This is the way you want to go and clear the jungle and gank in the early game.
Dont forget to backstab every single jungle camp as much as posible for more damage (your passive).
Put 2boxes at your blue buff at 42sec in the game, and then put 2 at Grump.
You will need a normal leash from your teammate at your bluebuff, save up your smite untill chickens, go to grump then and place another box. Then go to wolf camp -> chickens ->redbuff->golems->gank bot/top->schedule crab.
Try to gank other lanes untill you reach 1200g for your tiamat then you can recall. Keep on watching your minimap if the lane is gankable and if not just continue clearing jungle camps.

When you gank a lane you wanna gank with your Q from the bush or sometimes even at walls which are displayed in the photo https://gyazo.com/d046abfbe5cc819d0f1a79cbf71b1689 , here s a video of one really useful Q ganks that a lot of shaco players don't know about https://www.youtube.com/watch?v=5kT1WxTFjBU

As a tank Shaco you will wank to tank the fights, if it's posible try to Q on the enemie ADC and do as much damage to him and keep him out of the fight as much as posible or even kill him, else just be the front line for your team. In fights you will want to use your R as a dodge ability and also to proc your clone, whenever you see an ability that is going to hit you press R and dodge the ability. Press W behind enemies or infront where you think they will walk in Q as engage and escape and E to just deal more damage and slow the enemy, pop your tiamat/hydra as much as you can to deal bonus damage to monsters/minions/champions

If you want to take Rift Herald you want to have Tiamat and a Cinder and be atleast lvl 9, you want to clear it before 19:30 becouse that s the time Baron Nashor spawns.
You can kill him solo using your Shaco Clone to tank it with and keep backstabing the Herlard with your passive and the Herlard also takes the bonus damage from backstabing to other champions aswell. You will use your Shaco boxes too but try to put it a bit away from the Herlard and not on the top so the box will do damage and not take the agro and spam your E whenever posible