I think you misunderstood my question. I'd like you describe me how to make waza work with very small committed, but correct attacks. Good attacker will not commit too much, do you agree?
If you 'move' your intent towards him, either physically or mentally but prefereably both, he will respond. You skill is determined by how you deal with that response. All you can do in training is to set up situations that allow it to happen so you can train and develop it. That is what 'training' means, afterall.