Hey, the other day my players went up against a capital ship in a much smaller ship. They did it only to delay the ship until a different ship could escape.
The angle they were attacking from had 10 guns. Instead of rolling 10 times I was thinking that you can roll once and give the capital ship a blue dice for every gun that could fire at the PCs.
So the pool would be:
Gunner skill plus 10 blue dice vs range and silhouette.
It could still be a massive hit but would only be once per round and wouldn't be as bad for the players as getting hit 2-3 times with the regular gun. It also wouldn't take up nearly as much time.