Plasma state is difficult to setup and keep for a long time, I heared this tech decades ago when I was a student, and till now I do not think it is ready to come into use.
J-10B/C, even JF-17 with AESA can wrestles hand with Rafale, J-20/FC-31 will defeat PAK-FA, and all of them can come into use before Rafale and PAK-FA in IAF. PAF has time to make a decision.
FC-31 is a good choice for Pakistan AF.
As I know, there is only 3 countries, USA, Russia and China can develop 5th stealth fighters now. Japan, India, South Korea, ... just write PPTs.