The Ranger as he stands today will stop an attack if we will loose the battle. What we added one more feature, this would stop the noble from attacking a village you have already nobbled?
The suggestion is that as an added ability the ranger would not attack a player's own troops upon the village being conquered.
So say the 3rd noble conquered, the 4th noble would turn around and go home.
That would be great if we did not have an achievement for just that purpose of attacking ourselves.
It is when we lose the troops because we didn't have the time to pull the troops from the 3rd Noble that took the village and the 4th that attacked them. That is where we have to be online during attacks to see the outcome and pull those troops back.
It would save time, resources, headaches. You wouldnt have to worry about how many you sent. Right now I send four in a train but if you had six with the last two having rangers you'd be safe.