Here's the broadside strengths I used in my conjectural version:

5 7 6, 5 7 5, 4 7 5, 4 7 4, 4 6 4, 3 5 4, 3 5 4, 3 4 3, 2 4 3, 2 3 3, 1 2 2, 1 1 1

It strikes me that the Meregildos sailing angles are the worst 1st rate in the game, which would be my vote.

According to my ship card, the Meregildos already uses the F deck, so that sounds like a perfect choice to me.