The priority score is rated on the following points: * What are the advantages you get in return for using the blueprint? Is she actually strong, do you get access to strong equipment, or is it both? * How often can she be used? If she cannot be used in most maps, can she make a huge impact in maps where she can be used? * Does her remodel come with disadvantages? While getting high priority ships are encouraged, do not recklessly pursue them in a way which will affect your fleet negatively and plan things out before committing yourself to something.