maybe a galactic/para military faction, who uses conventional weapons (Tribarreled battleship cannons, machine guns etc…)
and there ships are big, unifeciant, cheap, low sheild, high armor, high hull.
but all there weapons are horribly inacurate and long reload, or very, very expensive. and all weighty
there ships are slow
but when there weapons hit they 1. go though sheilds 2. they do massive damage
also miniguns (think A-10’s in space X10) Can just be missel lauchers with high rate, low damge, and no turn
and a new order
they (if armed with flack) will shoot around aliied ships, there anti fighter defence system as the flak cant penertate armor.