What is the best way to kill bombers?

[gaunt1]

Both German and Japanese bombers are very weak. Aim for the engines, very easy to ignite them. You can kill lots of them even with planes that have low ammo supply and fairly weak armament, like Yaks and MiG-3. Treat He-111 and Ju-88 as unarmed, their defensive machineguns cant harm you. Do-217 is more dangerous, but nothing special.
On the other hand, G4M can be deadly with its 20mm gun.