I made the A-Wing more expensive, because the Rebllion was nearly unable to aquire them due to their huge costs, after Yavin. The A-Wing was at the start hand-made, had advanced sensors and and Nav-Computer instead of an R2 unit onboard, everything adding to the costs. Not to forget, that the more advanced an fighter or equiment item becomes, the more it costs. I did not get the A-Wing more firepower than a X-Wing, I just got them closer together. 5 for the A-Wing (2x2 Lasercannons and +1 for missles) with no Torpedos while keeping the X-Wing at 8 (2x4 Lasercannons) with torpedos. And I think that the TIE-Advanced Mk.II/Avenger is more realistic than the TIE-Defender. It is still fast, agile, shielded, good armed and can jump into the hyperspace and is very expensive. Perfect Elite-Fighters, why add somthing to have an Elite-Elite fighter for wich you can purchase whole captial ships, so that there will be only 1-3 squadrons in the galaxy. If there were enough spots I would include them, but this way the Avanger is the better choice. And I dont even think the A-Wing hull and engine is even capable of supporting more than 2 las.-cannons.