Hey guys, I am Janitorial Staff. I am currently at a 1307 ELO. This is my first actual guide that I've really put effort on. Ever since Thresh, all I've been doing on him is playing him as an ad offtank with sustain/tank/attack speed. Most of you are probably thinking, that sounds.. stupid.

Not many people take me seriously when I go AD Thresh top and they think I troll. So in return, they troll back, for example: ADC Soraka on bot.

I hope you guys try it and comment for any inputs

Thresh is a twisted reaper whose hungry chains ensnare the souls of the living. A moment's hesitation at the sight of his ghostly visage and there is no escape. He leaves in his wake hollow corpses, their souls ripped loose and trapped in the sickly green light of his lantern. The Chain Warden takes sadistic joy in tormenting his victims, both before and after their deaths. His grim task is never complete, and he stalks the land for ever more resolute spirits to unravel.
Thresh carves careful, deliberate paths through Valoran. He handpicks his targets individually, devoting his full attention to each soul in turn. He isolates and toys with them, gradually eroding their sanity with his twisted, maddening humor. Once Thresh takes an interest in a soul, he does not relent until he possesses it. He then drags those he captures back to the Shadow Isles for an unimaginably dreadful fate. This is his only purpose.
Little is known about the Chain Warden's past, and many of the details live only in nursery rhymes and campfire tales. They tell of a sadistic jailer from centuries past who took great delight in torturing his wards. Patient and brutal, he used a variety of methods to break his victims' minds before their bodies succumbed to his grisly designs. Chains were the jailer's preferred instruments of terror. Their shrill scrape marked his dreadful approach and promised agony to those he visited. His dark reign went unchallenged until his prisoners escaped during a massive riot. They overwhelmed him, and without ceremony or remorse, hanged him from his own chains. Thus began the unlife of the horrible specter known as Thresh, or so the tales go.

Thresh now haunts the land, leaving an aftermath of horror and despair. However, there is a devious purpose behind his dark machinations, and the meager spirits of average men are insufficient. He seeks stronger souls. Only when he has broken the wills of Valoran's most resilient warriors will he finally have what he needs.

"There are few things as invigorating as taking a mind apart, piece by piece."
―Thresh

Pros:

Late game tankiness
Passive armor stacks
Crowd Control (Especially when you land that hook)
Great Teamfight
Awesome against AD champs on top

Cons:

Squishy early game
Hard to master
Must be able to farm well to late game
Hard to do well against AP champs up top, such as Teemo, Akali, Vlad

FARMING IS A MUST

EARLY GAME: You cannot do well with Thresh if you do not farm gold AND souls. I go for late game superiority than early game with Thresh due to his passive. His passive makes you ridiculous late game especially against AD champs.

MID GAME: By mid game, you should be able to have more than 100+ CS and at least up to 85+ soul stack. This is when you can start using your teleport and helping your team in teamfights. Make sure to tell everyone to ward. Warding is a key point for Thresh to help out on teamfights especially when you're up top (still farming) and your team engages into a teamfight down on bot or dragon.

LATE GAME: Just farm, but stick with your group

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Thresh is a fun AD top offtank champ and if you do master his grabs and his E, you will be great when it comes to teamfights. You should focus more on the carries in a teamfight and be able to disable the tanks with your CC.