As for the Stealth Bombers, you're on your own. You have absolutely no turrets, and must rely on your ability not to be seen to get the job done. A recommended tactic is to change your standard cloak to the Heavy Cloak which renders you nearly invisible for about 30 seconds time. Follow the same exact procedures as bombers during the run, begin launching from the 1200 meter mark. If you have the chance after blowing your target, ripcord out and restock on missiles.
Bombers are extremely essential, and are one of the most important ships to successfully win a game.
The gunship is rarely used in games, but does have it's purpose. The gunship is equipped with cap ship turrets, which are extremely powerful when in the hands of good gunners. A Gunships purpose is to provide fire support for a wide variety of missions, whether it be to assist in a bombing run or to provide fighter support inside a sector. Gunships also function as an excellent anti-capital craft with their small size and powerful turrets. Do not underestimate a Gunships power, it is essentially a capital ship gun platform with weakened armor and shields.