Attack parameters

Assumption: Autoattack uses substantially less server process than clicking attack until a territory is taken.
Sometimes you want to
a) whittle an opponent to a certain level (not take the territory)
b) want to ensure that you have a certain number of armies remaining.
Suggestion:
An attack until button which allows you to set when to stop attacking - based on how many armies you have left, or how many armies are left on the territory you are attacking.
This should speed game play and reduce server load.
Sometimes you want to
a) whittle an opponent to a certain level (not take the territory)
b) want to ensure that you have a certain number of armies remaining.
Suggestion:
An attack until button which allows you to set when to stop attacking - based on how many armies you have left, or how many armies are left on the territory you are attacking.
This should speed game play and reduce server load.