If I may be so bold as to state that I am dead sick of fighing MiG-21s - regardless of Era. We did see Paran use Mirage 5D in the later campaigns. Maybe this is an option? Esp as France and in some cases Great Britain has not hesitated to sell to theese regions.
If would probably use a mixture of MiG-23s, maybe a single squadron of 25s/31s, Mirages and the like for Paran.
With the F-5 and F-16 in place, I do not really see that Dhimar would have a need for a dedicated Attack Aircraft, but a few late era A-4s for Reserve duty never hurts. Considering their doctrine, the Harrier (earlier models, doubt they can afford later ones), is also an option. You could always have a extra F-5E tailored for Ground Attack.