Actually this is an interesting subject, and I would really like to hear what you have to say about "my" tactic.
I have two basic "tactics" on the head to head merge. Either I take the shot, or I avoid the shot.
When I approach someone head to head, I always hit wep and nose down when he is about D3.0 out. This is my standard move. I then watch him to see his reaction to this. In 7 times out of 10, he will manuver towards me to get a HO shot.
This is good.
When he is about D1.5 out and manuvering to get a shot on me, I start to pull back as hard as possible. What I'm doing here is starting an Immelmann. He on the other hand is still manuvering to get a shot in on me. That means that on the merge, I am nose up, gaining altitude, and losing speed at the start of an Immelmann, while he is nose down loosing altitude and gaining speed.
This situation almost always ends up with me being D1.5 above and behind him. He is faster than me, but I have alt on him, and Im on his 6, or at least in his rear quarter. Often he will be in a flat turn trying to reverse towards me. In that case he is burning all the E he got when diving towards me on the merge. Which is good.
This situation almost always ends with me getting a snapshot opportunity on him. I will have plenty of time to set it up and judge angles and speed, IMO it is a good shooting opportunity.
If he doesnt go for the HO shot on the other hand, but instead start manuvering before the merge. I often go for the HO myself. The difference is that I will be nose up on the merge, and I'm just squeezing off a salvo hoping for a lucky hit. I miss more often than I hit, but it doesnt really bother me that much.
What is important though, is that I always want to be nose up when we pass.
Is this a good or bad tactic?
(Oh, and I always fly 190D9s or 190a5s)