Since when should an x-wing have to wait for a friend to take a tie off him? X wings are imperial designed space superiority fighters that should be able to take on 3-4 ties at once in the hands of an experienced pilot (i realize this would cause balance issues in a game).  But maybe it would be possible to make it so that the imperials always had 2/3 of the people and the rebels 1/3? and then make the x wings as powerful as they should be? If you want lore examples, rougue sqaudron could take out an entire imperial star destroyer single handedly along with its entire compliment of tie fighters/interceptors/bombers withough losing a single pilot, flying x wings of course. (again, i realize that much unbalance simply wouldn't be possible in a game, but 1 tie fighter should not be a match for 1 x wing). But in the Galactic civil war the rebels would always win any evenly numbered fighter engagement, fighters raiding were what the rebels relied on, where as the empire relied on thier mass numbers to counter the superior fighters of the alliance. So if you really wanted to be realistic about it, i guess i would suggest to try making the rebels rely on thier fighters to take down either a larger number of imperial ties, or maybe a better way to do it would be to give the imperials superior capitol ships (which they had) and make the rebel fighters do most of the job of taking them down as well as the inferior imperial ties.

Sry, ill have to find the exact x wing series book that was in, but it is there