I am making something like an escort mission, where you have to protect a Demon destroyer (you are a pilot for a new faction called the Terran-Shivan Alliance), but most of the ships attack YOU. The threats posed to the Demon are, in order of appearance in the mission, a Sobek (easily destroyed by the Demon), a wing of Osiris bombers, a wing of Ursas, two damaged Aten cruisers with BFRed cannons, and a wing of Boanerges or Boanergeses or whatever the plural should be spelled. Otherwise, the opposition is supposed to mop up you and your fellow pilots so they can send in more cruisers, bombers, and corvettes later.
One difference from many FS2 missions is that you play as Beta 1. You relieve Alpha wing, whose three ships are down to 5% hull integrity and their shield generators destroyed. You have to keep them alive for a few seconds until they can warp out.
Here are the objectives:
Protect TSD Doomgiver (primary objective)
Eliminate wing of xenocidic Shivans who are attacking Alpha wing
Protect Alpha wing until they warp out (primary objective)
Destroy all hostile ships that warp in (I mentioned the first wing of GTVA ships (Cancer) in the briefing by accident)
Then return to base
I don't know how to make objectives work right, so I'll send my mission to you. I placed two objectives in: Protect the Demon destroyer (which was named the SD Monster at first but I changed the name to TSD Doomgiver but didn't change the objective), and destroy Cancer wing. However, I can't make the objectives work right and prevent destroy-hostiles objectives from appearing in the briefing. Can anyone help?