Anyways,
Personally I would recommend 30-40km sectors, 1/8th weapon range (equiv of 3.75-5km for cannons, 2.5 for beams, 8km for missiles, 24 for MB)
35-50 server speed (=105 to 150 with overdrive), reduces issues with ping/desync getting in the way of aiming/hitting.
You might need to up cannon...