But the aircraft wich ditched in favor of jaguar is very familiar one for you, its mirage F1. The sole reason for Jaguar purchase was that, the decision had come from political leadership.
The IAF wasn't interested in either the Mirage F1 or the Viggen. Both were single-engined and not suitable for DPS missions.
It doesn't take any significant amount of knowledge to know that the IAF wanted the Jaguar.