High fuel fraction for long range and ability to outlast an opponent in a dogfight. Mostly passive electronics to locate, identify, and count enemy aircraft through their own emissions. Radio and radar silence presumed for most tactical flying. Presumption of no BVR combat, except possibly with passive radar-homing missiles. The fighter would inherently have a good clear night capability since infrared works better at night than during day and enemy night bombers would have to use their radar.
Turbojets are much better than fans for supersonic cruising, and singles have less supersonic drag.
Much depends on finding the answer and following it in future fighter-development programs. If either of the other schools is correct, we have a great opportunity. Intellectually, the Air Force officer corps appears not merely sluggish but moribund. In a recent discussion with one former editor of Air University Review, I asked how many copies of the Review he thought were actually read. He replied that he had once discussed this question at some length with his colleagues and that they subsequently attempted an informal survey on the matter.