This guide will help to you to correctly build Thresh and other Supports in bot-lane in different match ups. The core items that are marked will give you and your team fight-winning mobility and tankiness, with added benefits of resistences to AP champs and ADC's. The masteries cater to the items, giving you more movement speed, extra gold and CDR on top of your CDR items. The runes provide you with everything, from tankiness, to armour, to damage on ADC's and magic resist. Summoners include Heal and Flash as they provide both mobility to finish off targets and engage, and also escapes for when you get caught out with ganks or your opponents. Thresh is a difficult champion to play, and one of the hardest to master against seasoned bot-laners. This is only a guide to help you pick the right items for match ups, the rest is up to you for reliable skillshotting and key decision making with lanterns, ults and the power of extreme mobility for your team.