All you have to do to get AI to bunch up is to sail for the last ship in his line, and away from the first ship in the line.
I just fought an uneven battle where I used that tactic. I had the USS Constitution (7exp) versus 2 galleons, 2 fluyts, and 2 race-built galleons (pirate faction, all 2exp). Difficulty medium, clear weather and moderate westerly breeze.
I started off with the weather gage and sailed in a wide arch towards the rear of their fleet. their lead ships started tacking into the wind, slowing their speed to a crawl. With the new patch, ships will adjust speed according to the lead ship and whats immediately ahead of them, so their entire line was basically immobilized.
To simplify, once I balled them up, I just kept picking at them with long-range chain-shot salvos, periodically sailing in closer for a raking broadside whenever I saw opportunities where their guns won't be aiming at me for a couple seconds (or only 1 or half a broadside could be brought to bear on me in time).
End result: USS constitution - 12 guns out of action, 44 casualties. Pirates - both race-built galleons sunk, both fluyts struck their colors with 1 sinking, 1 galleon exploded and the other captured. To the AI's credit it did break up its formation to try to cut me off and surround me.
For those who don't have USS Constitution, it is a slightly slower 24-pdr frigate with about 50% more hull strength.
Bookmarks