Could try him as an 3 or 4 maybe with Babar going to 4. Or he can bat at 4.
lol Babar is almost assuredly never being moved off the 3 spot. He's made that his own.
Shan will get his shot eventually and I doubt he's tried anywhere but as an opener. Frankly, he doesn't dominate spin enough to play in the middle order nor does he possess big time shots and I'm not sure if he can play quick either.
His best shot is as an opener and most likely Imam's spot if he's given a chance.