I wonder if this is intended:
Santa Guard cannot move and melee attack, yet they can shoot. Ideally, the ability to shoot and melee attack should be the same. Otherwise, Master Gremlins get too many advantages as they are the only type of guards that can attack.

My suggestion is to enable the melee attack for Santa Guards. This balances ranged guards and melee a bit. Seeing a troop that cannot attack doesn't make much sense in the first place.