Some tips I have for Imperial fighter use.
1. Even without the bomber rule, a basic Tie Fighter will hit a ship 50% of the time on blue dice. Considering how cheap they are, this makes bringing them worth it.
2. Remember that if you choose the command "Squadron" allows you to use your fighters to attack before your ship does. Rather than immediately gun your fighters to the rear end of the enemy ship, it's actually worth it in a lot of cases to attack the enemy ship at a location where your capital ship can fire on.
This means that you'll weaken the enemy ships shields for your capital ship to punch through, maybe get him to use some defence tokens early, likely keep your fighters in squadron range of that capital ship, and when it's the enemy's turn that ship has the option of either opening fire on your capital ship from that arc or the fighters... not both.
3. Certain abilities in the imperial fleet stack really well, and you should use them. A basic Tie Fighter only has 3 blue dice to attack enemy fighters with. However thanks to swarm, a supporting Tie Fighter will give it 4 blue die, and the special character "Howlrunner" will give it another blue die if she's in range, and if that Tie was activated by a ship with a "flight controler" it will get another blue die bringing the total up to 6 blue die. Incidentally, Tie Interceptors also have the "Swarm Rule"
4. Plot your Fighters around when the Squadron Command comes up. Unless you are running Rhymer, it's usually worth it to bring your fighters back into squadron range of a ship if you know that the "Squadron Command" is coming up next.
5. For that matter, getting Squadron Tokens is really useless for the Empire. Unless you are running a build of mostly capital ships and you only have a couple of squadrons, don't bother.