not only one efficient design,there will be 5-10 design be popular ships,every craft and fight game had themself's best solution unless FB can change the balance usual
If you think so, it's a big mistake. For example, in the game 《besiege》, there's no best plan. The fight between players will always start in an unpredictable situation.
Sometimes it is the super long-distance fire extinguisher burning, which requires fire prevention and fire-fighting design;
Sometimes it's a strong and heavy impact, which requires a more solid and impact resistant design;
There are also times when there is an overwhelming bombardment of artillery shells. At this time, it is necessary to prevent the design from being embrittled by explosion;
There will even be air strikes and mines, which need to deal with the design of air strikes and mines;
In short, as long as the players are not rigid minded, there will never be "the best design". Those who believe that there is the best design are mostly lack of the ability to create new tactics.