Mmmm...not sure about that TBH. I highly doubt the MiG-35 comes close to the Su-35. Forget about its range it's way less. Less weapon's load and possibly an AESA radar within the next year as the VKS's MiG-35 just finished factory testing and are now being tested by the RuAF but without an AESA radar. So something to consider but a slew of exellent weapons including BRVRAAMs and A2G and A2S. So it's a step up to the F-16 but not by a large margin, but it does give you the dual engine usage and could very well suplement the PAF F-16 fleet.
The problem would be introducing a Russian platform into the PAF so you'd be basically starting from scratch, even though you have experience with older Soviet-based Chinese platforms, it'll be a bit tougher but certainly manageable.
My opinion, if the PAF wants something to counter India's Su-30MKIs right now and for the next 15 years, there really is only one option. With some very heavy persuading with incentives for cooperation in whatever is needed (de-nuclearization is out of the question of course,) then there is only 1 choice for $12 billion buys you 75 F-15PSA (Pakistani Silent Eagle) at the standard that Saudiya and Qatar are buying. This is the ONLY viable option besides 100 J-11s to meet the Indian Su-30MKI threat along with all current inventory in the PAF.
1500 AIM-120Ds (PAF already operates the AIM-120C so it'll be like new shoes.)
1000 AIM-9X (easily adaptable and the most potent short range missile)
500 AGM-88 (need some anti radiation munitions with a beastmodejet like that)
Assorted GBU (same reason and PAF already operates GBU-12 IINM)
500 JDAM kits to go with 500 MK82 (just so the beast can also perform its other role)
I know it might seem crazy but what I'm hearing on this thread is the main point of countering India's air force and primarily the Su30MKI and there is nothing out there that is capable of doing that except for this aircraft since the Russians will not piss off the Indians and sell the PAF the Su-35 and getting the J-11 from China in this number is also impossible. So as crazy as my idea might be, it might make the most sense for solving the problem at hand in the OP.
Gripen, more F-16s, J-10s will not get you any parity or close threat to the superb Su-30MKI in the numbers that the IAF has. This solution might seem impossible but so is tackling India's fleet of MKIs. One will need to offset the other.