Berserker, this is not an exp ability problem. What if there is a 13th faction and the 1st non-upgrade can shoot? Also in some mod, Centaur may be able to shoot without exp.

Currently, Santa has two abilities. one is upgraded guards, and the other is more guards.

I am happy with two solutions:
a. Give the guards the ability to melee, just like they can shoot.
b. Disable the guards' ability to shoot, just like they should not melee. If this is adopted, it's preferred automatically skip the guards' turn as it's meaningless clicking the defend button.