Buying Griffin C/D doesn't have much sense IMHO. It is significantly inferior to Mig-29 UPG already in Indian service, and much costlier (price similar to price of SU-30 MKI) . Of course, you could wait for Griffin E/F but it would take time to finish that project, and by that time even FGFA could be ready .
Best option would be to finally introduce Tejas, even if not fully operational, in greater numbers. Even now, It has to be lot better then Mig-21 Bis . Rest of the numbers could be made up with improved Su-30 MKI .
well Tejas mk1 FOC got delayed by another year, and IAF will never buy it until it has got FOC.
as for Griffin i was indeed talking of E/F
from what i hear Tejas MK2 will be Griffin E/Fwith an indian stamp, some Air Marshalls were bold enough to put it in their autobiographies.
now there is something called the Tejas MK1.5 or MK 1A
Fitted out with latest israeli bells and whistles , especially the Elta 2052 AESA,