Oh come on dawg!
Even when I was a n00b FRED-er I could've whipped up something at least HALF-decent. Have you even PLAYED a user-made mission/campaign?
Oh wow.....you can place six maras in FRED and crank the waves up.......n00b
(Soz mods, I'm overdue to flame someone)
Look, the typical n00b mistake is to overwhelm the mission with fighters so that only someone like FUBAR can complete it because you think you're trying to impress everyone else. That isn't what this business is about, talk to Ransom or Blaise, THEY know how to FRED. This isn't FRED-ing, I could teach my 4 year old cocker spaniel to sticky tape his paws to the mouse and slap it down on the desk six times. Please man, read the wiki. Nebula Combat Training....urgggh!
Okay, you've got the nebula and the combat

But the training man, where's that?
If you were gonna' do this, you could refit the "Quick Combat" Option from the CFS series for Freespace by making a mission pack for the MVPs in which the player could opt to take on random waves of fighters with/without a wing, destroyers, bombers, something like that. But this.....what is this man? Is this even a mission?
I WANT to be supportive of you, but you haven't even made an effort here!