Yeah I'll get back to you on that book 'Anten'... Down rep? Get a life bro.. @Trashberg, I wasn't trying to put down the effort you put in

My comment was geared towards the whole philosophy behind combat using thruster's. Yes it is a very good guide for beginners, I don't think it's bad to say it is simplified, I'm sure you would agree! The point being that for those wanting to use advanced techniques, a similar more indepth set of diagrams and instructions would be great.
Well, no hard feelings here 777. It's a basic concept. Reason for the pics were mostly because OP wanted to know if there were any reasons for using thrusters in combat, and some of the responses addressed these two possibilities. Since I have been thinking about how it really should work in theory, after testing those two option, I made some pictures for fun. And from experience this theory seems to be right.
To OP, another thruster manuever, when engaging larger, slower vessels, might be to line up beside them, aim at them, slow down and "strafe" left/right thrusters in the direction they are going. Use roll to keep heading in the right direction when the target changes direction, use up/down thrusters to circle around the target (finding subtargets/avoiding turret fire). Pitch to keep aiming at the target and fine tune with yaw. Use back/forward thrusters to keep your distance/close in if you're out of weapon range, or set them to 50% if you need maximum maneuverbility for a period.
Since you use all thrusters, and you put yourself in a more exposed position, it can get out of hand pretty fast, if you're alone with a 'Conda and he really, really wants you dead. Since you try to stay at his side, following his movement, you're only a quarter turn away for him to aim at you. If there are multiple ships engaging your target, this way you'll also keep out of friendly fire, which is nice. It's probably best used with FA-OFF for those who master that skill, but it works with flight assist aswell. Just need to keep pushing those thrusters, otherwise you'll stop dead in space.
I'll probably not draw a picture...