I present: Fair Defense.
I propose a new risk dice roll mode: Fair Defense. With Fair Defense, a defending territory will always kill a number of troops equal to the troops stationed on that territory, + 0-3 more troops depending on chance. Example: 10 troops attack 5 troops, at least 5 of the attacking troops will die, but no more than 8 can die. So the attacking troops will 100% win, but still lose a fair amount of troops doing so.