Not an expert, but my attitude towards dueling is that it's far more a psychological/strategic battle than an ACM one so long as no pilot is too far above the other in ACM understanding.
More important is predicting your opponent's move, or perhaps baiting them into a certain move that you can exploit. From my experience in the last dueling bracket, the advantages I generated in my duels were created mostly by flying a "no-lose" merge which brought me back to even with my opponent in the worst case and gave me a big advantage in the best case.
After that, it's just a matter of pressing home the advantage using "standard" ACM and good gunnery.
Edit: proper ACM understanding is a prerequisite to flying this way. The ACM understanding tells you what moves counter what others, what moves to fly to exploit a given situation, etc. Without the understanding, you can generate exploitable moves by your opponent but completely fail to exploit them.