Here is how to beat the level "Line them up"
- Use your Heavy guy to shoot the wizard on the right twice.
- Then shoot the wizard on the left.
- Next move demon man up two spaces on top of wizard.
- Shoot the wizard on the right.
- Move Demoman two squares right.
- Then shoot the wizard on far right.
Job done.
Hard as hell but now you know how to solve it :P