Oh, okay...you need to implement "overkill" training. A lot of this becomes situational, so forgive me if this seems to be a one dimensional answer.
You need to practice optional awareness combat scenarios with 6 or more steps. You also may need to isolate each one of the components: entry, CQC attack, takedown, finish and escape. It's important to note that at any stage of the scenario a disengagement could take place; this is paramount with multiples.
You also need to progressively practice with resistance and safety gear. You need a good coach who understands what happens to someone who has been elbowed in the face at close range. These sessions unsupervised can so easily turn into an event of diminishing returns.
What you are referring to is what I simply call "follow through." Most of the time, you will not need 6 or more steps before your opponent will fall down, but that's where the overkill part comes in.
Joe