Ran some attack testing today, Human V Human. The biggest problem I see is the 10k archer test, with no buildings the defender won handily, when giving the defender 5:1 ratio of Guard Towers you would think they'd continue winning in that archer battle - but instead the reverse happened and the attacker won and even sustained fewer casualties while the defender got shat on. I'm guessing the GT formula is setup backwards at the moment so the attacker gets the buff LOL
Other insights gleaned, I think the Medical Centers calc may be off too, need to look into it further.
Other than those issues, the rest seems pretty straightforward. If you send overwhelming force = you can zero out the defender. If you send underwhelming force you get zeroed out. If you send similar sized force you lose/kill similar sized troops.
10k archers v 10k archers = LOSE
We managed to kill : 0 Knight 0 Infantry 0 Pikeman 0 Heavy Infantry 6877 Archer 0 Mounted Archers
But we lost : 0 Knight 0 Infantry 0 Pikeman 0 Heavy Infantry 8367 Archer 0 Mounted Archers
10k archers V 10k archers (with 5:1 guard towers) = WIN
We managed to kill : 0 Knight 0 Infantry 0 Pikeman 0 Heavy Infantry 7531 Archer 0 Mounted Archers
But we lost : 0 Knight 0 Infantry 0 Pikeman 0 Heavy Infantry 6081 Archer 0 Mounted Archers
5k archers v 10k archers = LOSE
We managed to kill : 0 Knight 0 Infantry 0 Pikeman 0 Heavy Infantry 3659 Archer 0 Mounted Archers
But we lost : 0 Knight 0 Infantry 0 Pikeman 0 Heavy Infantry 5000 Archer 0 Mounted Archers
5k archers + 5k infantry V 10k archers = WIN
We managed to kill : 0 Knight 0 Infantry 0 Pikeman 0 Heavy Infantry 5923 Archer 0 Mounted Archers
But we lost : 0 Knight 2997 Infantry 0 Pikeman 0 Heavy Infantry 2912 Archer 0 Mounted Archers
10k archers + 10k infantry V 10k archers + 10k infantry = LOSE
We managed to kill : 0 Knight 5600 Infantry 0 Pikeman 0 Heavy Infantry 5914 Archer 0 Mounted Archers
But we lost : 0 Knight 6591 Infantry 0 Pikeman 0 Heavy Infantry 6047 Archer 0 Mounted Archers
30k archers V 20k archers = WIN
We managed to kill : 0 Knight 0 Infantry 0 Pikeman 0 Heavy Infantry 19299 Archer 0 Mounted Archers
But we lost : 0 Knight 0 Infantry 0 Pikeman 0 Heavy Infantry 12378 Archer 0 Mounted Archers
10k infantry V 10k infantry = LOSE
We managed to kill : 0 Knight 6349 Infantry 0 Pikeman 0 Heavy Infantry 0 Archer 0 Mounted Archers
But we lost : 0 Knight 7547 Infantry 0 Pikeman 0 Heavy Infantry 0 Archer 0 Mounted Archers
10k infantry (with 2:1 medical centers) V 10k infantry (with 2:1 medical centers) = WIN
We managed to kill : 0 Knight 7292 Infantry 0 Pikeman 0 Heavy Infantry 0 Archer 0 Mounted Archers
But we lost : 0 Knight 6797 Infantry 0 Pikeman 0 Heavy Infantry 0 Archer 0 Mounted Archers