Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
Sorry for my bad English.This guide only work if you gonna solo mid.You need to be more levels than your enemies in order to do more damage.Because of my items you will not have enough attack speed so you have to take the advantage of ambush's attack speed.Also you have to combine your ulti's attack speed bonus.If you do that you will have death lines because of ulti and ambush that will do around 600 ctir dmg in every second strike.Also as Twitch you have to check out every time the enemies if they have oracle potion on wards.I they place a ward its good either to avoid these area or you can destroy it by buying an oracle too.Whenever you have to use your ulti you have to place your self in an excelent position so the "dead lines" to do dmg to as many enemies as possible.
With Executioner's Calling
15 Critical Strike Chance, 18 Life Steal. UNIQUE Passive: On hit, you cause 4 damage per second for 8 seconds. UNIQUE Active: Inflicts target enemy champion with Grievous Wound, causing 50% reduced healing and regeneration for 8 seconds. 20 second cooldown.It's a very good item if you are facing Traric Sona or any other Summoner that can heal.
With Phantom Dancer
45 Attack Speed, 30 Critical Strike Chance, 20 Dodge, 15 Movement Speed. you will get the extra attack speed and critical strike chance that you need and with nfinity Edge
80 Attack Damage, 20 Critical Strike Chance. UNIQUE Passive: Critical hits now deal 250% damage instead of 200%. you ll be a god.
Your "Dead Lines"will be more deadly with this one Tiamat
42 Attack Damage, 15 Health Per 5 Sec, 4 Mana Per 5 Sec. Passive: Your attacks Splash, dealing Physical Damage in a small area around the target.
And in order to boost your overall damage and if they are not everyone dead :P.Buy this one The Black Cleaver
75 Attack Damage. Passive: Physical attacks reduce your target's Armor by 12 for 5 seconds, (maximum 5 stacks).
So you ll have 65 critical strike chance from the beggining and at the end you will combine it with a Splash, dealing Physical Damage and a Armor pen physical dmg boost