JF-17 to complement twin engine fighters, JF-17 would be good near the borders and to cover certain critical areas, in numbers
J-10C hasn't been proposed to Iran but J-10A which Iran after testing it didn't take it as it is an obsolete version, for JF-17, Pakistan would be exposed to massive sanctions, would Pakistan sell JF-17 to Iran and risk to get an even worse economy via US sanctions?
At the end, JF-17/J-10-C would surely help patching up the current single engine fleet which is composed of F-5s and blind Mirages and WW2 F-7N, but acquiring twin engine fighters is a first priority i think, J-16 is something that Iran should jump at if it's available, also i mentioned MiG-31, i don't see how it wouldn't benefit Iran
JF-17/J-10C for airspace defense in certain areas, also for striking nearby groups
Su-35/J-16/MiG-31 to cover large areas and cities. Su-35 and J-16 could also be used in case of war to bomb US bases after missile strikes to clean the remains or for Arabian Sea area denial.
We all somehow say that western fighters are better etc, F-18 and F-15Cs in 1991 was molested by some MiG-25, all of the above fighters can compete and shut down 4/4.5 gen western fighters
What i want to know is where is that project Kowsar at? We've never heard of it since 2018, why would Iran spend so much money for a single engine fighter which is the last priority of Iran needs for its airforce?