Convoy escort, commerce raiding, piracy and priveteering were all part and parcel of life on the open seas then .....and even now in some parts of the world.
I'd like to propose some small ship scenarios based on the above, perhaps team battles with one side escorting and the other side raiding.
The largest ships would be brigs or similar, very few pirates used larger vessels although a few of the more successful owned brigantines. Queen Annes Revenge was an oddity with 40 guns, and a converted French slaver so really can't be used as a basis for general ship size for raiders. Most piracy was accomplished with sloops or cutters, you didn't need many guns to cow an unarmed merchantman. Larger, better armed merchantmen and treasure ships required larger and well armed vessels to overcome them and would probably need different scenario parameters.
AI controlled merchant ships would start either just leaving port or about to arrive, The raiding side would win when all enemy warships were boarded or destroyed. The escort side would win under the same conditions as above and also perhaps if a certain percentage of the escorted merchants make port. Both sides could possibly lose 'points' for damaging or sinking any of the escorted merchantmen.
At least some of the merchantmen would have to survive for either side to win.
This idea needs to be fleshed out of course, but I think it would be an enjoyable scenario for small ship Naval Action.
Rgds: Jeff