Some of the information on the
http://www.spitfireperformance.com/ site has combat evaluations.
Most of the RAF aircraft reports contain them, they concentrate on dealing with specific opponents and how best to maximise your performance against them i.e. Spitfire IX HF vs 190A4 for example.
Robert Shaw wrote Fighter Combat: Tactics and Maneuvering which is pretty good but its a hardcore text book! Youcan learn allot from just wikipedia on manouvers like hi and low yo yo's, scissors (if you want to fly a fast rolling plane like a 190 or P47 you have to learn the scissors!) and thatch weaves for instance.
To be honest sim combat is like real combat except you life isn't on the line and you can hit refly but theres some golden rules to fly by in sims which don't require complex strategy, just common sense:
no1. SA Situational awareness - your more likely to get shot down by a plane you don't see rather than the one you do see. Trim your plane up and never stop looking out the window. First person to see an opponent is usually the first person to open fire. Even better get a wing man to help you look.
no2. Speed and heigh is life - Trim out your plane to cruise fast and maintain height. Being low down and without energy is the worst possible situation to be in.
no3. Get a wing man or be a wing man - Even if your some kind of uber pilot, you'll have a better kill/death ratio if you fly with another person who your in communication with. Its also a much more rewarding experiance to fly with another person. Even the crappest pilot will do well with a wing man as long as you compliment each other.
no4. Target fixation is bad- Three points here: 1) When you've unloaded some rounds into an opponent, if they look like they are out of the fight then leave them be and get back your height and speed, chances are they will crash or bail, get your height back so you don't compromise yourself and 2) Chance is that people saw your tracer rounds, this can draw freindlies and enemies 3) Chances is are the plane your chasing is actually bait and his wing man is right behind you lining you up.
no5. Don't be an ass and shoot someone elses kill - Happens allot online. Someone will set an enemy on fire, dewingthem or cause them to bail and then someone else on your team will try to pump some rounds into that dead plane to get the points. This is BAD SHOW and a waste of ammunition. Remember support team mates, don't try and compete with them. They'll in turn return the favour.