Big Set 2 Cheat Sheet: Champions & Items : r/TeamfightTactics
TFT Set 6 cheat sheet: All new champions, traits, items, and Hextech Augments - Inven Global
New Cheat-Sheet Every/No-body asked for ! : r/TeamfightTactics
9.16 version of my cheat sheet (item combinations without tabular format, classes/synergies in alphabetical order and pool size/probabilities + player damage tables) : r/TeamfightTactics