About the only instrument I look at in here is the speed gauge, with occasional glances at altimeter. If you are getting beat at merge turns you are probably going too fast. Try to find the best speed for turning with a given plane and hang around that, even if you need to chop throttle before you merge.
Also make sure you have all views for your stick. That means an UP view as well that you hold down, so it gives the UP/SIDE,UP/BACK ets views. If you lose sight of the enemy its bad news. I black out on initial turns quite often, but they are the light variety, when its only a split second of balck, then I ease up slightly,and as soon as I come clear I go full pull again. By that time your energy is at a more controlable level. Also, dont over pull. All stick inputs should be as if you only had a 1/4 inch of sway in your stick, rather than slamming it around. The enemy will usually find a way to stall by themselves..as long as you maintain gentle inputs, you should come out ok. Im still learning this game as well, but its amazing how similar this AH is to Air Warrior. I guess physics is physics.