Rather than consider "deadly weapons", you're better off considering "lethal force." Empty hands, ropes, pillows... lots of things CAN become lethal force depending on the circumstances, because "lethal force" is commonly defined as force that is likely to cause serious bodily injury or death. To justify the use of lethal force, you (or a person you are protecting) have to be able to say that you were in imminent danger of receiving a serious bodily injury or being killed.
Whether the force you choose to employ will be considered lethal force will depend on the totality of the circumstances, includiing your intent and how likely a particular technique would be to cause such injury. Beyond that -- there are issues about charges of simple assault versus aggravated assault or malicious wounding. These basically depend on the seriousness of the injury likely to occur by the attack; empty hands are typically simple assault, but if they cause bleeding or cuts that will scar, or cause other significant injuries (brain trauma, broken bones, etc.), more serious charges of aggravated assault or malicious wounding are likely.
And, of course, I am not a lawyer, nor should anything I've written be taken as legal guidance.
Whether the force you choose to employ will be considered lethal force will depend on the totality of the circumstances, includiing your intent and how likely a particular technique would be to cause such injury. Beyond that -- there are issues about charges of simple assault versus aggravated assault or malicious wounding. These basically depend on the seriousness of the injury likely to occur by the attack; empty hands are typically simple assault, but if they cause bleeding or cuts that will scar, or cause other significant injuries (brain trauma, broken bones, etc.), more serious charges of aggravated assault or malicious wounding are likely.
And, of course, I am not a lawyer, nor should anything I've written be taken as legal guidance.