You make a good point that it's possible with a Y-Wing but with the many caveats of having a character that has 5 Agility, being mostly through a Pilot specific spec tree giving them a bunch of ways to enhance their combat & a pilot droid brain installed, still with the idea that you got 5 success + 2 adv/1 tri + had enough destiny points to flip + success on all other checks in the encounter + you don't get defeated in 1 round of combat.
Personally, I don't suspect things will go as smoothly in one's favor since dice are involved but it's certainly possible with all of those things that you can deal a hefty blow to a Vigil-Class's system strain.
I guess it's also good to remind myself that the Imperial Light Cruiser apparently can't handle 2 proton torpedoes in the show. It's supposed to be pretty weak.