Guys,i watched the videos but i have a question how are u supposed to steer your ship hold down the right mouse key and press whatever keys u have bound to rapid fire?unless i am missing something,and yes denne Ashcroft is a brute,far stronger than he should be.
With practice dude, truly practice is the best teacher there is. You can use these combos best in Free-Flight, just maneuver more on the battlefield and then attack when the time is right, because if you're not moving much, you're an easy target, especially in CF. Although if you still can't get pass him, you can lower the difficulty in the Options, even allowing yourself a 'god' mode if you deem it so.
About the equipment, the folks here have already given you much advices, good luck.