New article on is up on Moddb, taking a look at the Morale gameplay mechanic for the Galactic Empire.
What special abilities do you have setup on the TIE defenders if any? They're one of the more neat imperial strike-craft in my mind.
Well, fighter abilities are a real pain to make, and nothing you can do in Sins really fit for the Defender. However, the TIE Defenders have 3 different weapons (Lasers, Ion Cannons, and Missiles) which allows them to deal substantial damage to almost any unit. They are also one of the fastest units in the game and are quite hard to destroy, unlike other TIE Fighters.
That said, the only way the Galactic Empire (the first Imperial Faction that will be available) can get TIE Defenders is by summoning the Elite 181st TIE Fighter Squadron from hero unit's special ability. Not only do you get 12 of these terrors, but their reputation causes fear among all enemy strikecraft in the gravity well, reducing their damage.