Typically, spending your action on a Target Lock is a risky proposition unless you are fairly certain that you will not have to worry about enemy ships attacking your ship that combat phase (Since a Focus or Evade will help mitigate damage, or a Barrel Roll or Boost would possibly get you out of a firing arc, while a Target Lock is purely offensive).
This is why Vader works so well with that Advanced Targeting Computer. His pilot ability gives him two actions per turn, so it's not as risky anymore to take your Target Lock. Push the Limit also allows two actions per turn (at the cost of taking a stress), and the reason I put it on my 2nd TIE Advanced (Juno Eclipse) is so she also gets to Target Lock while also performing a more defensive action. Since Target Locks are so important to get a good use out of Advanced Targeting Computers, I think two actions are pretty essential to perform effectively. Otherwise, Accuracy Corrector is probably the way to go.
unless you have Jendon with ST-321 title handing out a target lock on turn 1, muahaha
On that note, I'd like to show you guys a list I've titled "I Have You Now":
Colonel Jendon w/ ST-321, Emperor Palpatine (37 points)
Darth Vader w/ TIE/x1, Advanced Targeting Computer, Predator, Engine Upgrade (29 points)
Omega Leader w/ Juke, Comm Relay (21 points)
TOTAL: 100 points
On turn one, Jendon does a target lock action, target locking an enemy ship across the board (thanks to the ST-321 title). Omega Leader does an evade action, which will stay on him the rest of the game thanks to Comm Relay. (Vader does whatever.) At the beginning of combat, use Jendon's pilot ability to move his blue target lock token to Omega Leader or Vader.
On turn two, target lock again with Jendon, then at the beginning of combat move his blue token to Omega Leader or Vader, whichever didn't get it on turn one.
Now you've got both ships set up: Vader uses his target lock to add a crit to his attack rolls for free with Advanced Targeting Computer and can get rerolls with Predator, allowing him to spend his two actions per turn on focus, boost, barrel roll or evade; Omega Leader uses Juke (because he always has that evade token) to change an evade result to a focus, which can't be modified thanks to his pilot ability (that prevents a target locked ship from modifying attack and defense dice) which triggers thanks to the target lock Jendon gave him. Meanwhile, the Palpatine on the shuttle provides support for Vader and Omega.
It's more synergy than the Empire ever thought possible! I'm 2-1 with it so far; I like it but I'm not sure it throws enough red dice. The shuttle definitely needs to get into the fight and shoot things or else there isn't enough firepower to win with this list, which is unfortunate but there's not much to be done about it. If the two fighters get killed, you're probably toast because it's easy to get behind the shuttle and blast it to pieces. What do you guys think?