How to build more ships?

Note that you very rarely need more than 5 ships, except for a scout rush or phoenix rush.   Endgame, the mighty SIEGE ship should give you enough firepower to punch through even the toughest defenses.   Back before it existed, endgame vs Unknown could be quite a chore with the wimpier Cloudsave or even Overlords.

[White=#212121]Are you talking about easy and normal complexity? Since at the legendary level of complexity, even the three flagships of the "Siege" are scattered to the nines with the maximum characteristics of guns and armor.[/White]