The single biggest mistake players make is creating a "do-everything" fleet of 10 heavy, 20 light, and 15 transports. This fleet will lose to a dedicated 30-heavy fleet and also lose to a dedicated 50-light fleet. Why?
90% Light Ships / 10% Heavy Ships Example: 45 Light, 5 Heavy
: Ideal if you have a wide line of Triremes and outnumber the enemy.