You'll struggle to get target locks on the right ships at PS 2
For Range 3 shots, anyway. because you can move in close, cluster missiles aren't a bad choice if you want generic bombers with missiles.
I'd probably rather take Extra Munitions (which also comes with the K-wing and punisher) and double-load them than take plasma torpedoes, for the reasons given above.
That saves you a point per bomber and makes them a lot less fiddly - otherwise you need to try and land within range 3 (to get your target lock) without letting your opponent dart in to range 1 (within the torpedoes minimum range).
If all you have are imperial aces, then there are some good named pilots in there. Whilst a lot of people (for good reason) default to Soontir Fel, there's nothing wrong with Carnor Jax (who you should have available) - used right his 'no focus or evade' bubble can be lethal - especially if you can drop a pilot inside it at the same point he eats a face full of cluster missiles. Note that Jax doesn't have to be firing at that target himself, just near them; flank him wide and try to come in from the side or behind - avoiding arcs with him is far more important than actually getting a shot.