You are talking about the unions on TT. There is no best union, you can just join according to your own interests.
TT (TT-team) is a game social app designed for mobile game players. The Android version was launched on December 24, 2014.
On TT, you can receive gift packs, join guilds, conduct real-time voice chat for mobile games, entertainment live broadcasts, game communities, and mobile game e-sports leagues. It is a mobile game voice chat tool loved by players. Committed to creating unlimited communication, entertainment and team-fighting game experiences in mobile games, it brings together popular mobile game players, and the game circle helps you find playmates.
This is a mobile game voice chat tool loved by players in the Eastern Hemisphere. Designed specifically for mobile game players, it is a game social app that integrates mixed guilds and in-game real-time voice chat.
The mobile game guild system includes powerful guilds from popular mobile games; the original guild opener is a real-time guild united voice voice specially designed for mobile game guilds, allowing you to contact guild friends without leaving the game. .