So it seems the ammount of Prisoners taken is equal to the ammount of troops killed.

I want to max my damage to enemy defenses for every attack i do, and capture their defspecs as prisoners, effectively doubling my damage in casualties.

If i am at my prisoner cap i need to send 200% in prisoners, of that which i expect to kill, so that when i capture enemies as prisoners, i perfectly refill my prisoner cap, while doubling my defspec removal.

Anyone have a forumla, or something similar, that will show me the expected kills of an attack?