Ok, so my suggestion for the day is to make a new category of weapons/armor. This should be for the epic units that you find and or get. My lava scorpion currently has a mid level bow, a mid level helmet and a piece of jewelry I found from one of the dungeons. Now those give the unit my highest attack, defense and hit points stats but really is not that realistic.
Maybe there should be a new building like the armoursmith and forge but for epic units. Just a thought really. Or maybe a new category for the elite merchant and or both.