Do these locks need to be combined with easy armor door jamb armor?

No, we actually do not recommend using both products. Our locks have been rated to withstand up to 4000 pounds on a wooden door/frame. Easy armor is great for converting your wooden frame to steel, but only makes the install process of the lock that much harder for very little in return. You are secure with your current door given you do not have pre-existing door damage. This is why we do not recommend using door jamb armor with the Ultimate Lock