Note:

This is a guide not a build and ist for Twitch starters!!!

Well first as Twitch you should gang al the time and yout tactic should be that, you get behind an Enemy and shoot the **** out of him. You should ALWAYS get first blood or try not to get killed because when the Enemy gets a Ward or something where he can see where you are, youre f**ked. But after the first two Items, you should look like this when your visible again:

Its also important to kill the Enemy that is trying to get the blue buff, wait 2-5 seconds until the Golem spawns and kill him when he finished the Golem. Result you get the Blue and first blood.

You need a Pusher or Supporter on your lane and try to Gank all the times. But be careful one Stun and, you are again, f**ked. I played Twitch all the time until I got lvl 22 then it got boring and the Enemys knew where I am and could kill me not like the noobs that started crying after they got killed ;).

1. Never, ever, ever, ever, did I say ever already? Be in one Team with Evelyn the Enemys buy one time a Ward and you can write: "GG"
2. Gank, Gank, Gank
3. When the Enemy is trying to escape, use your E-Spell even if its a Killstealyour team will benefit it.
4. Bully the Enemys on your lane so often as you can
5. Ignore the Chat, because everybody hates Twitch
6. BE A LIVING MACHINE GUN AND SHOOT THE **** OUT OF THE ENEMYS AS IF YOU WOULD PLAY CALL OF DUTY!!!

7. try to hit Minions with your Ulti because of the Life Steal.
8. Beware of Enemys like Jax, Alistar and Sejuani that can stun you.
9. Tell your Team that they should focus the one with Oracles Elixier he`s the most deadly
10. When the Enemy has a Jungler try to go in the Jungle and Disturb him.

Pros: Your Stealthed
You have the among highest Attack Speed in LoL
At early game nobody expects you.

Cons: One Ward, or Oracle`s and you can do nothing accept watching your Team.
Everybody hates you
You have no Armor, or Health Points

Thats my first guide and I say thank you for reading it and please forgive me for my English because im German ;) (Der Gerät) please rate it and give me a comment what i can do better or so.
Thank you for reading it and have fun with all the Pentakills. ;)