Been toying with the idea of running double TIE/D defenders. Came up with this list I call Double D-Rolls.
Rexlar Brath: TiE/D, Tractor Beam, Predator 41 pts
Maarek Stele: TiE/D, Ion Cannon, Predator 41 pts
Howlrunner 18 pts
Definitely a formation focused group, but its pretty nasty. 1 reroll on the secondary weapons from Predator, 2 on the primary. With an extra reroll if they're low PS targets.