A ruse is the opposite of a decoy; a ruse appears weaker than it is while a decoy appears stronger than it is. Some ideas for ruses: a. Allow the user to set a weapon to "Show next lower level"; e.g, make a mortar appear weaker. b. Allow the user to set a building to "Show next lower level"; e.g., make a storage container appear smaller. c. Allow the user to set some small number of wall segments to "Disappear"; e.g., draw the attacker to a "missing" section of wall that isn't actually missing. I can't tell if the weapons prefer some entities over others, so I haven't any attacker ruses to suggest.
If it was implemented it needs to be like the mines. Where once used you need to buy it again from the store. (or just leave it and charge a rearming fee)
