Prestige for Retreating
How are you expected to move up the ranks when you are clearly winning a fight and the other person retreats their attack from you before it's over and you get nothing from it?
Here's how I think it should work:
Callback of Troops BEFORE a fight - 2 Coins
Callback of Troops DURING a fight - 4 Coins, loss of 25% of the prestiege of the retreating troops, AND normal prestiege calculations for the battle.
For example, assuming Prestiege award levels of 1/inf, 4/Cav, 2/Arch, 10/Cat
Attacker and Defender each have 500/250/250/1000
Defender kills all Attacker's Cats but losses 500 of their own.
Attacker Retreats
Retreating Army is 500/250/250/0
Defender Army Remaining is 500/250/250/750
The value of the Retreating Army is 2000 Prestiege
The Value of the Troops the Defender Killed is 10,000
The Value of the Troops the Attacker Killed is 5,000
Therefore, when the Attacker Retreats, the Attacker should Lose the normal 5,000 PLUS 25% of the 2000, or 500 for a total of 5,500 Prestiege gained.
The Defender would only gain the prestiege from the units that were killed.
Even if they don't implement the Penalty, Troops Killed should always equal prestiege, Period.