I quickly threw together a tips and rules video for BNZ energy fighting in the Bf 109 E-3 German fighter. This video should also apply to similar fighters such as the YAK or other capable boom and zoomers. It's short, but I touched on some of the important points. Most importantly, over anything, do not engage in turn fights with anyone or hang out at low altitude where the rest of the fighters are. You will quickly become scrap.
The guns on the Bf 109 E-3 aren't amazing, but absolutely do the job. I believe I scored 7-0 in this match. Nothing spectacular, but acceptable for about the 15th or so match with the Bf 109 E-3. I went through what I can only describe is blood pressure raising hell to get to the 109, as the fighters prior to it are trash in my opinion.
At first I really despised German aircraft. Now that I have the 109, I have absolutely changed my tune. Surprisingly, I've found the 109 to have incredible survivability, even though Germans have paper wings. Though, I feel like the 109 E-3 actually does take hits quite well for a German aircraft. In the matches I've flown with it, I've almost never been killed.
One mistake I see a lot of people making is attempting to get a shot immediately, keeping their nose in front of the target, putting themselves in a hard turn and preparing themselves for an overshoot of the target over better preparing for the shot to stay at the rear and engage longer. Sometimes this is a viable tactic, others it is not. Never overshoot from the rear: pull up, allow separation and flip back over on the target's rear again (not a full Immelman). Check the video to see what I mean.
Enjoy. Sorry for the somewhat low quality. I'm still trying to optimize the game for the 550TI and recording.
Update: I seem to have resolved my quality issues. The next video should be a solid and sharp 720p.