Battles are automated. The skill lies in economy management (saving gold for interest), positioning on a hexagonal grid, and building synergies through champion traits.
Eight players compete in a round-based free-for-all. You draft champions, combine them to level up (up to 3 stars), and equip them with items. Fight Tactics.exe
If the ".exe" refers to a utility, it is most likely TFTactics, a popular desktop overlay program. Battles are automated
While there is no widely known software or game officially titled the name likely refers to the executable file used for Teamfight Tactics (TFT) or its popular companion application, TFTactics . 1. Teamfight Tactics (TFT) positioning on a hexagonal grid