I've had mixed reviews about this mode. I really like the almost forced importance on the fact that your must play smart, or risk losing your ship.
Have you tried different fighters? The bomber might do more damage... There's definately more improvements I would like to to see done to them... but you can use the missile defense fighter to great effect... And the bomber might do more damage.
Suggestions to you:
1) Try different fighters, and filling different support roles instead. Missile defense, pinging targets, etc.
Suggestions to devs:
1) Slightly increase the damage of all the fighters.
2) Make healer fighters heal more than just other fighters... the hp on fighters is so pathetic, it's ridiculous offering them a dedicated healer.