Or you can just blow 'em all up with cheats 
That always works.

Although the enemies are so shortsighted on very easy that you can pretty much just fly straight to the target without thinking about them at all.
13 was the easiest.
I had to skip the others.I like the battle between the ancients and the Shivans.Nice campaign.
Interesting, you must be playing some of these missions quite differently than I did. I don't think I have ever gotten caught in 14b or 14c except when going for optional bonus goals (the cargo bit in 14b) or deliberately trying to fail for testing purposes.
I would have put the distance reduction thing from 13 into 14b and 14c, but I was running into the event limit and thought the missions were too easy to bother with that. I'll see if I can find a way to do it in a new version. One more version will be needed anyway to maintain compatibility with the Media VPs, once those finally get updated.