The *Best Defense*...is a good offense...and that is why SA is so very important. Pick your target, pick your fight, fight to win. Don't fly defensively...fly offensively.
Someone on this BBS once posted...." a con on your six is better than no con at all...! " This, in my opinion, is flying offensively. This requires that you have good SA, have picked your target (yes, he is behind you...you wanted him there, didn't you? If not, then he picked the fight, not you...) and you picked this particular fight...and now you are going to win by luring him in close enough to let him think he has an easy kill...and then you do all of those ACMs you think are defensive moves...to get him to co-energy states, or force the overshoot to put you on his six...and kill him. Easy? No. It takes practice to learn the timing and the manuvers. Where best to learn these skills than in the TA?
One more thing...attitude. Attack! Attack! Attack! Keep your opponent reeling from your onslaught. Make him think defense...make him think escape...make him fear you through good SA, aircraft management and a harrowing offense! Make him wonder just how the heck you did what you did when he had all of the advantage, or thought he did.