This is sort of a nuanced suggestion relying heavily on the fact that the confed rule from PTP is added to normal live servers. (This is the rule that you can send reins to only allies or confeds)
Now I'm sure for everyone there has been times where a fellow member is being attacked and you know it but your friend is offline and you can only watch his account go down in flames. I have often wished to send reins in blind but always held back due to the fear that he wont be able to feed them and we dont know the situation in that attacked village.
What i propose is this. When you send reinforcements to your friends, the reinforcer will be able to see the crop balance in that village once the troops arrive. As in the reinforcer will get a breakdown of how much crop his troops are consuming and how much overall crop is being consumed by troops from third parties. And have a red indication when the crop is about to get over in that village so that the troops don't starve. This way, defenders will have it more easy. And since most of Travian's player base is working adults, there are times where the account will be offline even with sitters.
Of course, I dont mean this to be heaving in favor of the defenders. You will still not be able to know how much crop there is already there in that village and the granary size. Which will enforce a greater need for communication so that from time to time you tell your allies what you granary level.
It will be something like this:
My troop consumption: -643
Total troop consumption: -1672
Remaining balance: +234
If people could add to this suggestion it would be nice.