You will collect level up products for your pilots as you progress through the story mode on normal difficulty. Upon finishing level 10, you will access to Heroic Mode, which is essentially the very same story campaign however with harder enemies. You can most likely attempt brave mode right now as your CP will remain in the 800 levels. Heroic Mode has even much better loot than Normal Mode! You can find main and escort fighter fragments, and even pilot fragments! Attempt playing through Heroic Mode once your CP is high enough if you are looking to expand your lineup.