City number is irrelevant. A 25 pop. city with NC by 1AD would have over 60 science alone. Not that I suggest that, because as I mentioned before I think doubling the population of every city would result in throwing off other numbers and I would like to see India be able to expand a bit easier.
In the past I've suggested giving Mughal Fort +2 happiness, since the gold bonus doesn't come significantly later and +2 culture is weak. Something like +2 food per city and +2 happiness on Mughal Fort would mean that early growth gets a kick-start and the 4 combined happiness from walls/colosseum would result in overcoming that local unhappiness per city significantly quicker.
They would still expand slightly slower than other Civs, but would result in larger than average cities. The added synergy between Mughal and the UA would be good, too.
Unfortunately the addition of composite bows and the awkward upgrade path for chariots (war elephant) makes their UU less than desirable, but that is a needed improvement across the game and not India specific.
Edit:
In the past I've suggested giving Mughal Fort +2 happiness, since the gold bonus doesn't come significantly later and +2 culture is weak. Something like +2 food per city and +2 happiness on Mughal Fort would mean that early growth gets a kick-start and the 4 combined happiness from walls/colosseum would result in overcoming that local unhappiness per city significantly quicker.
They would still expand slightly slower than other Civs, but would result in larger than average cities. The added synergy between Mughal and the UA would be good, too.
Unfortunately the addition of composite bows and the awkward upgrade path for chariots (war elephant) makes their UU less than desirable, but that is a needed improvement across the game and not India specific.
Edit:
Spoiler :
A 2-3 food surplus, which is city center tile plus either plains farms or two grassland farms per mine results in ~7-8 pop. city after ~100 turns, more or less the 1AD benchmark (T115 standard pacing). An additional 2 food per city for a 4-5 surplus would bring that number to ~11. Obviously granaries, water mills, and civil service will change that, but just adding numbers to give an idea of how +2 food per city would change city numbers in the early game.