Basically a ton of teams I've thought up for Diep.io. These are only suitable for TDM.
Use Ctrl+F to find a particular tank.
Larger teams will need the players to have a way of contacting each other(wikia chatroom) as otherwise they will be impossible to manage.
STILL WIP.
The Unstoppable
Tanks: Smasher, Overlord, Machine Gun, Ranger
Numbers: At least 5.
Setup: At least 2 Smashers to patrol. The Overlord is protected by both the Machine Gun and Smashers. The Ranger uses their extended vision as an early alarm to warn when a tank approaches by shooting in that direction. This set is flexible, allowing certain tanks to be swapped with others, eg Machine Gun with Triplet.
Tested?: ''No.
Breakdown
Tanks: Overlord or any other Overseer tank except Manager, Smasher/Landmine
Numbers: At least 3
Setup: The Overlord/s protect the Smashers with their drone and the Smashers protect the Overlord, making a win-win team.
Tested?: Yes.
Test 1: With a Necromancer and one Smasher. Shot down very quickly due to low HP after attacking a tank.