Not sure who came up with idea first, it wasn't me and it wasn't the guy who suggested it at the LGS but it was a ton of fun.
What we did was play a three player game of escalation X-Wing. We all started with a single 15 point ship, and when someone's ship gets blowned up they respawn with a 20 point ship and the person who killed it scores the value of the ship.
So we start with 15, then 20, 25, 30, 35, 40, ect... Each time you kill a ship you score the value of the ship and the first person to 100 wins the match. I don't know if you'd need to go much past 40, as it would be likely someone would've won by then.
To make things more interesting we dropped a debris token where the ship was destroyed. Since there was only three ships on the table at a time it makes for a fairly open field. The debris field had a few other interesting effects. One it made it a bit more cinematic with ships blowing up and having to dive/turn or drive through the debris.
It also could make a range 1 kill shot a bad thing because you may not be able to avoid the debris. By the end of the game we had like 9-10 debris and the 6 asteroids on the table.
We decided that if a ship got destroyed by an obstacle or fly off the edge, the last person to damage it got the points.
We were also talking about next time deducting points when you lose a ship, not the full ship value but maybe 5 or half it's value. So that way you don't just get destroyed to bring in a more powerful ship.
Two of us picked a corner and the 3rd guy set up on the far edge which made it fairly even, then when you respawned you came back in on that same spot. That kept the furball moving around the table nicely.
What typically happened was one of the ships would get hurt and then it becomes a race to see who can get the kill shot, since only that counts for points. But in the process the other two ships get banged up enough that one is likely to get killed, and the new ship is fresh so it has an advantage over the damaged ones.
It also made Lone Wolf quite handy since there were no friendly ships, but it does make any upgrade that targets another friendly worthless. It also made the game feel even more like the old XvT game since you had only one ship, dog fighting and maneuvers were vital because you don't have any sort of synergy with other ships.
I think four players would be better than three, but three worked, I don't know if it would work with two because regen could be huge. The game took about 1.5 hours but it was a blast to play. I'd highly recommend anyone who wants to try something different give it a shot if you can get three or more people together to try it.