So to sum up - poor missiles, a gun pod that was so bad pilots felt it better to leave at home and a jet with the flying characterics of a brick - also BVR missiles you had to use at visual range - cant think of many other ways to make it more of a challenge really - other than to only fly on 1 engine :)
The gunpods always been a must for me in this sim if available - becomes invaluable after Ive jettisoned the AIM-4Ds into the ether.
On the other hand flying the F-4B in an early 64 nam campaign captures some of that futility by having 4xAIM-9Bs and 4x AIM-7s to fight the Mig-17s with - sometimes all you can think of doing is to try and lure the Migs away.
Difficult enough against the poor AI - but against a real pilot probably a nightmare.