Scenario drilling as Chris mentioned above is the Alpha and Omega of self defense PERIOD, not only from a physical standpoint but educationally as well. Direct sparring is nothing more than fighting and fighting IS NOT self defense. From a tactical standpoint you want to apply the proper force to get the job done and leave and that is difficult to accomplish on a training partner fighting back. Pads and bags are for technique and confidence training. Partners are for feel and movement drilling
I agree with the scenario training. Problem is, some don't seem to see the value in it.