So, I've been working in this design space for about 20 years, and published in it for 16.

I can make a case for space combat being 1D or 3D; it sounds like you're aiming for the 1D end of the spectrum. 1/

Here's the first problem of "realistic" space combat.

A) There is no stealth in space when using interesting reaction drives.

B) Interplanetary transit velocities make "natural" closing velocities hit in the 6-10 kps ranges of closing velocities.

/2

C) Thermodynamically limited reaction drives probably have thrusts measured in 0.1 G increments, if that high.

Given A, B and C:

* You will know the fight is coming *weeks* in advance.
* Your ability to maneuver relative to your rate of closure is...constrained /3