Start of using the fence technique developed by Geoff Thompson and then use a pre-emptive strike in the form of a right cross or a hook punch to the jaw, which are good for knocking out opponents or at the very least, knocking them down so you can escape the situation. Locks do work in theory but they are very hard to apply in most cases, especially if you have allowed yourself to be attacked. Once that happens everything becomes spontaneous and you end up just striking in any way you can to stop the attack. Each to their own. Some are more comfortable in the clinch so they can throw or choke opponents. It just depends on what area you are most confident in.