This is the way I have found Shaco works best with on Dominion. All of these items are suggestions for you, and you can change it up if you like, getting more AS or less AS and more AD. It's all up to you.




UPDATES
-Switched up the runes.

Changed the runes. This is what I have been using recently and they seem to work really well.

Alternate to the masteries above is 26/0/4. These masteries are very helpful especially the CD. It allows you to Q more to get away/chase. The Magic and Armor Pen 10% is very helpful by itself and if you get Last Whisperer you would have a WHOPPING 50% Armor Pen. The Magic Pen is helpful for your E and when your ult dies so you don't have to up that since your AD. The 10% Magic Pen isn't super important I just find that if they are stacking armor you can Shiv them and still do a decent amount of damage.

After these items look at what you need. Do you need to get a Kitae's Bloodrazor because that one guy with 3k health and alot of armor keeps getting away? If theres someone like Rammus with 3k hp and 400 armor get this. Do you need a Frozen Mallet so you are more tanky and can chase better? Do you need a Last Whisper for alot of Armor Pen but they don't have alot of HP?
This Last item is up to you depending on if you need some defense, health, damage, etc.

Defensive Items that are aplicable:
Guardian Angel-if they have a well balanced amount of AP and AD and noone on their team is super carrying.

Odyn's Veil-If they have at least 3 AP or 1/2 AP but they are the only threat.

Force of Nature-if you need alot more Magic Resist than Odyn's Veil.

Wit's End-This isn't super defensive but if you just need a bit of Magic Resist and some attack speed

CORE ITEMS:

Infinity Edge-this is basically needed for that 250% crit damage since this build gets your crit chance to 70%. This adds to your Q so you do I think around 300% crit damage or something like that.

Sheen-This is a great item but to upgrade it to a Trinity Force you need alot of money so if you can pick up the Trinity Force.

Phantom Dancer-This is a must. It gives you move speed to make up for not getting boots of mobility and attack speed when you get your damage and crit up.

Sanguine Blade-This is really great. It gets your damage up quick and if you have the attack speed you can capitalize on its passive. The life steal can make you win fights you would have lost.

You can start out with Q,W,and E or the sequence at the top. Or get 2 points in your E and 1 in Q. I would recommend maxing E first the next is up to you. If your team got top and you are defending max W second or with E. If you seem to be attacking or trying to cap max Q second for burst damage.

Summoner Spells are up to you. I usually take Exhaust and Ghost so I can help save or cap points more often. Or you can take Exhaust / Garrison Ghost / Flash.
These are mainly up to you and how you like to play Shaco. Ghost, Flash, Exhaust, Garrison, Ignite are all spells I would say work well on Shaco. Flash is an iffy because you already have your Q which is a 10 second Cooldown Flash but if you run out of Mana or it's on Cooldown. Also with Flash you can Q then Flash for a double flash and easily get away or catch up. Up to you.

What NOT to get:
Clarity Duh this does absolutely nothing for you since there are plenty of Health/Mana restoring relics around

Promote This doesn't benefit any assassin...It's for certain champions that aren't Shaco

Heal/ Revive Just don't get these Revive isn't that useful with like a 20 second death timer and its 8 minute cooldown or something like that. Heal is the same reason as Clarity

Smite Only 3 minions each wave and it's not as helpful as other spells.

Cleanse This could work if the enemy team has a ton of CC, so only use this if you are playing Draft Dominion and they have alot of CC.

Clairvoyance Not really needed on Dominion for obvious reasons, 1-you can see champions unless they are in the middle. 2-If they run through the middle you can see them. 3-They aren't gonna stay invisible forever.

Surge This could be usefull for the Attack Speed but you are Attack Damage and it ups your Ability Power, This is an iffy. You could use it just before you Q so that your E hits harder. So mainly if you like it.

Pros:
-Very Sneaky, can run away if about to die
-His ult is a good distraction when capping a point
-He can defend points really well with his W and Ult
-There is a few more but I can't think of them

Cons:
-Very Squishy early on and just squishy-ish later
-Cooldowns are very high early on and aren't great later unless you build some CD
-When you get the buff from beating a quest, have the Super Shield from the middle, or speed buff your ult doesn't have it so its easy to target you. If they click on your copy and look your copy doesn't have the Crystal Scar Aura(this most likely won't happen though.)

Always try to ping who you want your team to focus, like the person with the most CC ie. Rammus so he pays attention to them while you are destroying their squishies. Try to let your teammates engage in the battle first so you don't get bursted down. Save your Teammates as much as possible. Placing 1 Jack in The Box could save your teammate or simply throw Shiv to slow the enemy chasing. If you are right next to the enemy and you think you can kill them do it(although when I do this my teammate turns around and steals my kill). But saving a teammate late game can decide whether you win or lose.

This is how "I" build Shaco on Dominion. I'm am always trying new items so if i find something that works better I will change it. If you have any suggestions on what to change, better items, etc. post a comment. I know you are thinking AD Shaco sucks on Dominion it is all about AP Shaco...In the games I have played AD Shaco on Dominion I have gone at least 5 more kills than deaths and 9+ assists with 1200+ points.