I use 2 personal mods that more or less do completely separate things:
difficulty mod (slows progress, forces me to use minimal number of ships):
3x supply consumption, 3x fuel consumption and capacity, 2x ship prices
0.2x exp gain
battle mod (slows down ships and increases weapon range to what I consider more "realistic"):
disable fog of war
increase max zoom to 4
combat speed set to 0.5f
weapons:
- PD weapons get 4x range, 4x proj speed, 0.5x damage
- Missile weapons get 2x range, 4x proj speed, 0.5x proj hp
- All other weapons get 2x range, 2x proj speed
- All beams get 100x beam speed (they're PHOTONS, people!)
fighters:
- 2x max speed, acc, dec, turn, and turn acc across the board
this gives a (imo) more "naval" feel, where a battle line is drawn and ships slowly grind each other to death. Missiles are fast and dangerous (it's satisfying to watch a harpoon sail gracefully through the battlefield). Very few ships can dodge projectiles/missiles or outrun fighters (more realistic, imo). PD is made more powerful to compensate, ships are generally able to intercept a harpoon barrage from an enemy of similar weight class and, in a battle line, can form a PD network (or have dedicated PD ships) to defend each other from the inevitable harpoon salvos when someone gets high on flux