The most important thing is to power the turrets with energy spheres. The turrets are the only thing that can damage Blakemore's ship, so no amount of shooting down enemy fighters or applying the virus will do anything if the turrets are offline. Your allies will be fine on their own. Just take a quick break to shoot down the torpedos every time they launch. The anti-missile device can be useful here.

The challenge plays like this:
- turrets are the only thing that can damage Blackemore's ship. It's not your main priority, but you need to keep them active to damage it. If you ignore the turrets, the challenge doesn't end.
- torpedoes are the real danger. They can damage your base and - game over. Keep an eye on that. Equip flak, and missile defense, or just flak if you are good with it. You see torpedoes, or your buddies warning about them, GO! They always follow an upward arc from Blackemore's ship to the base. Always the same average trajectory, and they go in that arc line. They are also slow, so you can blow them up easily. Just don't get too close to them.
- fighting enemies will alleviate pressure, and makes it easier for you to do the other things. Yet, it's the least priority. You can even pop a cloak consumable, and go recharge a turret in stealth.

So, I would say your priorities are:
1- torpedoes! Gotta blow them all before they reach your base. ASAP.
2- turrets. If you want to finish this soon, recharge those turrets. They slowly chip at Blackemore's shields, armor and hull.
3- enemy fighters. If your turrets are recharged, and there are no torpedoes inbound, just kill some pricks.

Thanks guys for your advices !
Will try that !

I think all you mentioned is important. I was heavily under fire, shields down most of the time. Thats the mission^^
I say, load the turrets first, on your way between loading and reloading you fight them back, then miningmissles, and the rest comes by itself, repeatingly..

I passed it with your good advices !
Thanks guys !

I had a heck of a time with this mission using the gunship. I switched to the bomber and it was easy.