I struggled with this pretty bad.
I had revelation when i noticed my capital started performing better in battle, it brawled allot better, lasted longer and beaten bigger ships easier. And the reason was removing one of my large weapons.
So losing DPS and freeing flux actually made my ship better

Yes cause it was in that equilibrium of cleaning soft flux of enemy fire, also cleaning 15% of hard flux and still sustaining to fire all it's weapons.
My best tip is to: Beat the AI.
The AI does things predictably, you saw it on your ships. When it fills it's hard flux, it tries to back off, even tho it can smash the enemy ship, it tries to back off to clean flux.
Stacking your wolf 4DP? with kinetic weapons(Anti shield) can actually make 10-20DP ships back off. It will never kill enemy ship, but it fights it, both have to back off to clean flux.
or
Experiment with with stuff. Having tanking ship with maxed shields, flux capacity, speed and just PD weapons with cautious officer and send them at start to go behind enemy lines.
It will drag half of their fleet for minutes, just remember it dies if it's engines shut off

so that's it's N1 weakness.
or
slow projectile weapons / missiles. YOU can back off, vent flux and come back in and enemy will keep their shield up cause one of your rockets is SLOWLY flying towards them.