Well, there's a few options. You can fly directly at it while maneuvering to avoid getting flakked, and then unload your weapons on it when you're close enough. You can also try climbing up to stay at the limit of the destroyer's flak range and then just bomb it from high altitude. You may also be able to maneuver to be either directly ahead of or behind the destroyer, so only one gun can shoot at you instead of both, and then make your attack run.
go full German corsair mode
Use a frick ton of cannons (2 to 6 should do) on full auto (edited with XML) and make it rain hell
I personally prefer diving to less than a hundred feat and weaving until I’m about a mile away, then I open up with whatever weapons I’m carrying.
Well, there's a few options. You can fly directly at it while maneuvering to avoid getting flakked, and then unload your weapons on it when you're close enough. You can also try climbing up to stay at the limit of the destroyer's flak range and then just bomb it from high altitude. You may also be able to maneuver to be either directly ahead of or behind the destroyer, so only one gun can shoot at you instead of both, and then make your attack run.