Base size, followed by medium size, so on. Then damag, hit, and cost.
Base missiles start at 10 damage per swarm of 10, with a maximum fire rate of 20 missiles per "round". In case you want to try to swamp the enemy defenses or are in a hurry to get out of Dodge and want to try to damage the enemy on your way out.
Interceptors are designed to prevent Bombers from doing their job of attacking heavier targets and to stop scout interceptors. They are developed as a Fighter variant. The Fighter itself was the first small craft, and it's remaining sort of middling because it has a lot of roles to fulfill. Bombers are for attacking heavier targets, or for acting as defense - you might have noticed that the Hanchu Counterbomber has sacrificed part of its missile load in favor of more counter missiles.
Room for 10 fighters and two spares, which come with the ship. You can fit a Yacht, or a Corvette, but it's going to eat up all of your normal Fighter bays and some of your cargo space. Anything bigger is a waste of time. You can try to shove a Frigate in a carrier, but that would use 100% of your space and then some, which would give you the worst of both worlds.
21 light years in the Eta band will take just under three o days to three and a half days, roughly. It depends on your engineers, whether or not you are paying maintenance on your ship, and local hyper conditions. If you are skipping on upkeep, you're going to wait the extra time so you don't accidentally crit fail and either turn crew into chunky paste or the ship into a radioactive glow cloud filled with tiny bits of debris.
There is some variation because you might want a sidereal velocity higher than 8,288.64 kph which will be what happens when you go down that many bands if you are at maximum hyper velocity. If you drop into Alpha hyper, build back up to 0.6c, and then translate into sidereal, you'll have a velocity of 129,510,342 KPH. That's a very significant difference.