I'm not sure. I only know from experience that a Civ will give up a size 1 cultureless city fairly easily to get out of a war. Since Ghandi will keep at least 2 defenders in Delhi we can expect to defend against 4, maybe 5 warriors. If we have a spear and a warrior in Camelot then the spear wins two battles and auto-promotes. Depending on the HP's left then the remaining warriors will either attack, fortify or pillage. However, having captured 2 workers, and destroyed at least a third and maybe half the Indian armed forces - plus the fact that it is our first war with them, they will talk. Workerless they are dead anyway. If we take a city, then happy days - but it is not the point of the war, just the spoils.
The risk is that without BW we will need 3 warriors minimum and we probably won't get the auto-promote for two wins in a turn. The likelihood of all 5 warriors attacking the city and sacking it are increased. My judgement is that there is an expansionist civ that we will meet in the ten turns it will take Ghandi to get to Camelot, and that in that time we may even meet other civs. We have enough gold and gpt to buy BW straight up. We will get BW in time therefore. We probably need to change the current warrior build to a spear pre-build however.
I don't want to be the cause of the quickest ever DG defeat. But I really don't want to be stuck with playing the percentages either.