Editing Arrow tower (section)

== Arrow towers under the AI control ==
'''General observation''': Arrow towers target the enemy troops depending on their "class". The class is assigned for every enemy troop stack based on their opportunities to deliver damage to the defending troops.

*''Class A'' - the enemy troop stack can attack immediately when it is its turn to act. [[Ranged]] units, that still can shoot, belong here.
*''Class B'' - enemy troop stack, which can't attack immediately, but can attack its next turn.
*''Class C'' - enemy troop stack, which can't attack immediately and its next turn, but can attack after.

The AI considers the Arrow tower damage equal to 1 (bug), that is why it prefers to target the stacks with 1 unit in it over the stack of the same units with number, let's say, 10 in it.

There are 2 factors, based on which AI chooses its target. The priority target is calculated separately for each class.

'''Loss in army power'''
*<big>''For class A: priority = 1 * ([[AI Value]] / hp) * 100%''</big>, where 1 is the Arrow tower damage (bug); AI Value - total Value of the stack; hp - total [[Health]] of the stack.
*<big>''For class B: priority = 1 * (AI Value / hp) * 50%''</big>
*<big>''For class C: priority = 1 * (AI Value / hp) * 33%''</big>

'''Loss in army quantity'''
*<big>''For class A: priority = 1 / hp * 100%''</big>, where 1 is the Arrow tower damage (bug); hp - total Health of the stack.
*<big>''For class B: priority = 1 / hp * 50%''</big>
*<big>''For class C: priority = 1 / hp * 33%''</big>

After the calculations AI chooses a target with the highest calculated priority. If there are several troops with the equal priority, then the AI will choose a stack, which was placed in the rightmost slot of the hero's army.

Knowing this and considering the fact that the AI prefers to target shooters, it might be a good decision to fill your empty rightmost slots with ranged troops with a single unit in each of them. The other possible way of saving the friendly ranged stacks is to move forward, closer to the primary Arrow tower, a powerful stack of tier 1 troops or a [[flying]] stack.