@ReposterI did find an interesting tactic while going through the story mode on ace. If you approach from the 11 or 1 o’clock position (from the front of the SD and off to one side). You can fly just over the top of the hull and fire torpedoes just under the shields to hit the targeting system. With full blasters on an Xwing and the proton torpedoes, I got the targeting system down on the first pass. Be sure your torpedoes don’t hit one of the other turrets. With a bit of practice mode this should really help. It works.
I think the size of the SD, makes it take longer to set up an attack on a particular place, and it is a bit unbalanced. Not sure why they went with MC75 instead of Mon Calimari Cruiser to avoid that issue.
For max damage, I use proton torpedoes, and then proton bombs to follow up. Best one run damage I could find for Y-Wing attacks.