@VEVAK
Ti aside. The IRIAF could have gone for R&D on larger fighters after the Saeghe without Ti and something like a RD-33 copy also without Ti. They didn't and to me it looks like they were not given a go ahead from upper tiers. We even know their next project, a JF-17 like fighter, a step higher than the F-5.
Every fundamental technology was available to start that R&D project but from 2005 onward IRIAF R&D on such scale was stopped. Today they have, together with the MOD, created the Kowsar and many primary avionic subsystems that could be used in a future F-313. Gathering avionic subsystems is quite important. For me a good decision to not go for the next step, that JF-17 like fighter because it would likely have taken more than a decade for the IRIAF R&D to come up with a prototype.
You correctly said that nickel super alloys are the real critical material for any R&D on engines necessary for fighters. But I have a good news for you, MAPNA is the main force in that field for Iran, no need for IRIAF R&D.
They are so advanced in that field that without announcement, they certainly produce single crystal turbineblades.
So we have neither a problem when hot turbine parts are necessary for engine R&D, nor are we forced to use Ti in engines and airframes. On that I have another good news from another field: Irans uranium centrifuges use steel superalloys for some critical parts and high grade carbon fiber for the rotors.
Ti is available anyway via the Chinese.
Metallurgy and materials are incredibly important and hard to master, we need at least several hundred experts for that field. I bet, or rather hope that the IRGC-ASF would go directly to MAPNA for nickle base alloys and to the centrifuge department for marraging steels if they want to copy the RQ-170 powerplant.
On the Qaher:
If your airpower can survive the high intensity phase of a conflict and actively fight in it, then airpower has a degree of flexibility that is very much desired.
I painted a scenario in which the F-313 is such a low maintenance design, with such a small logistical footprint and rugged operation regime that it would have the necessary survivability, distributed around the country and camouflaged.
This is the basis for manned airpower in Iran and if Q-313 are operational within the high intensity phase their flexibility and situational awareness can be used. When is it superior to a similar UACV?
In air to air combat, foremost BVR. A unmanned S-171 bomber can always attack its target even without communication link on a pre-programmed course. A pilot can acquire the target, decide and shot with no communications working.
The mobility of a aircraft is uncontested, with two Fakkur-90 (pop-up --> shoot --> dive and run) the F-313 is a fast and flexible "SAM site" and with bombs it can attack targets of opportunity. If IADS has problems to do the task with SAMs, a F-313 is guided via a short communication contact to the coarse airspace where the enemy aircraft should roughly operate, and the F-313 will switch on its own small 100km range AESA to find the target and attack it with all its AAMs and disappear via terrain masking (maybe take a second look for mid course update in safe distance).
The F-313 needs to be extremely low maintenance (15% of that for a Su-30). I require it to fly 100 hours with just fueling and maybe new oil/filter. I want it's two engines to operate max. at just 60% duty cycle with no afterburner and still power it to mach 0,95 at sea level.
I require a huge amount of automation in order to reduce pilot training + advanced simulators.
I require all the other things already described on rugged/short take-off and landing on dirtfields.