I know the DMs out there will appreciate this.
What you do is simple. You are essentially running a game for a friend. have them play Rebels, and tell them they can have 3 or 4 ships (depending on what you want to have them do). They can upgrade them however they want, the sky is the limit.
Then you simply fly them against wave after wave of TIEs, using about 4-8 on the mat at any one time. Once they shoot down an entire wave, give them a turn to reform and then have more waves fly in. You'd probably want to designate a zone or zones where they'll come in from. Every few waves, throw in a named Pilot, perhaps with some upgrade like Squad Leader.
Basically the Endurance matches from Rogue Leader. See how long your friend can survive the onslaught!