I guess I go at it a bit differently.
I build my ships according to what I see on my enemy ships. In general, if I am in a defensive posture, I build ships with lots of firepower and wait at warp holes. If I'm on offensive mode, I'll use a bit more armor and shielding.
So, in the "Slynky Book of Ship Design", how ships are built depend on several factors and vary from game-to-game.
For example, if I find myself facing Asmala, I just go ahead and put the "coffin components" on board to save time
