I have a question. I'm a little puzzled here, so help me out.
So the purpose of a mid-air refueler would be to strike targets beyond the range of strike aircraft's normal (with drop tanks) range.
That implies that these aircraft would be refueled once their reserves are really low, like at the midpoint of the strike mission or at the end, once the strike has been completed-on the way back.
Your airbases are close to the border. For Pakistani strike aircraft to strike a base in Assam, these IL-78 aircraft would have to be over Indian airspace.
The only use I can see would be over the Arabian Sea, to strike bases/assets in the South of India, that would mean IL-78s operating in areas where the Indian Navy, arguably, would hold an an advantage due to it's Aircraft Carrier (s).
On the other hand,if Bangladesh were providing Pak the use of airbases....
Or maybe it's to use strike aircraft taking off from bases close to the Afghan border....
Someone help me out here. Why do you need these aircraft again?