Leave them unperked on bombers AND ground-attack planes.
Fw 190 isn't much without the 500kg egg, and unless we get the 2 (or 3, we're still not sure) 250kg racks installed, it won't be much under such an ordnance system.
P-47 is also one that should carry heavy ordnance, and maybe the Typhoon (not sure if it was used more as a fighter or attack aircraft).