In previous Stellaris versions, corvettes used picket or swarm combat computers, keeping them at close to medium range. This made them vulnerable to short-range enemy weaponry. Artillery combat computers, however, allow corvettes to engage at long range, significantly reducing their exposure to close-range fire.
The Ancient Nanom Missile Cloud Launcher boasts a phenomenally high fire rate, overwhelming enemy point defenses with sheer volume, despite individual missiles doing relatively little damage. It also has full shield and armor penetration, guaranteeing hits unless the enemy has extremely high armor or shield hardening. Additionally, it provides a 25% hull damage bonus.
The "Lame Corvette" uses blue lasers, flak batteries, and a swarm combat computer.
This video explores a powerful, versatile corvette design in Stellaris 4.0. The speaker argues this design, utilizing artillery combat computers and specific weaponry, could be the only ship design a player needs throughout the game.