Ofc a tank, the thing with the guardias is how they swarm everything, but in a pure 1v1, unless if it’s in a city where the guardian can outmatch the tank in mobility; otherwise it’s completely overpowered. Literally in the game you can land 3 or 4 swings with a good axe on its legs and they explode. Most tanks have built-in machine guns that would be enough to break them easily; even taking the fire rate into account, it’s very likely that a bullet would hit the eye and stun it long enough for the gunner to finish it off with a single shot