Thresh is primarily a support but excels at disrupting the enemy carry's farm by spamming Death Sentence followed by Flay.
You must perfect the timing of Dark Passage to save your allies. They can get shielded during fights and/or escape if needed.
You can help your team most by focussing your Thresh build on armor and magic resist. Thresh will often be the first to engage the enemy team during a teamfight. You will often be targetted; get enough tank to survive.
LoL Thresh players could find him to be a difficult champion to build out properly. You'll find that his build changes when he is up against either well-rounded or highly focused team comps, showing you shouldn't follow the same Thresh build every single round of League of Legends
The best items to include in your champ's build include: Locket of the Iron Solari, Zeke's Convergence, and Redemption. Players who included these items in their kits had a greater win rate than players who utilized other Thresh builds. Moreover, if you are battling a varied enemy team arrangement, you should really consider grabbing him the Resolve, and Inspiration runes. In recent games, he won the largest percentage of his rounds when using these runes.
We calculated our Thresh build suggestions by examining 122,236 recently ranked LoL matches with him in them. We only recommend the top winrate Thresh builds that were built by ranked players enough times for us to suggest them. With so many rounds in our data, we are quite confident in our suggested builds.