Heavy:
The Heavy is an excellent class for MvM due to high durability and damage output.
You can play as Heavy on most maps and missions.
Avoid playing Heavy during waves with many tanks, as his damage against them is low.
Consider using the Vaccinator as your secondary weapon to protect the team.

Soldier:
Soldier is versatile and useful in MvM.
Learn rocket jumping to move quickly and avoid damage.
Use the Beggar's Bazooka to charge rockets and fire in bursts.
Prioritize health and resistances upgrades in early waves.

Medic:
Medic is crucial for the team. Keep your teammates alive.
Use the Kritzkrieg to boost your teammates' damage.
The Vaccinator can be useful for resisting specific types of damage.

Remember to adapt your class choice and strategy based on the situation. Good luck in MvM! 🚀 .