As always, read the rules at https://www.speedrun.com/seven_seas_deluxe/full_game before starting the race.

1. Use "undo". Can save a life at a dangerous moment.
2. Do not spare your life and spend them on ghost ships and shooting ships, it will be faster.
3. You can also try to destroy them without suicide, but if in the next 10-15 seconds you cannot destroy then you know what to do.
4. Train, gain more experience and maybe even you yourself will work out your own strategy Well, a small tutorial came out. Hope this helps you :3 Good luck!