Build ÜberCharge by healing teammates with the Medi Gun
Keep the healing beam active as much as possible
Heal injured teammates to build faster
Use the Kritzkrieg, Quick-Fix, or Vaccinator if you want different charge behavior
Protect yourself while building charge
Switch targets as needed to maximize healing uptime
Use ÜberCharge when your team is pushing, retreating, or under heavy fire
Coordinate with your team before activating it
Activate ÜberCharge with the default charge key for your game
Stay near your patient while the charge is active