This is simply raw data on the cost of a pirate versus the amount of ATK she provides. Skills related to ATK have been noted. Pirates are listed in order of best to worst for convenience.
To explain, the ratio is how much ATK you get per 1 point you spend. This does not necessarily mean that Pirates at the top of the chart are your best bet or the bottom of the chart are your worst choice. Total Attackpower, skills and the total amount of points you have to spend are more critical deciding factors. This data is to show how much "bang for the buck" you get for your pirates.
ATK to Cost Ratio at Max LevelEdit
This is a work in progress. More will be added soon.