Bombers are needed constantly. The events in game are not unlike SWAT assignments IRL everytime.
And a missile equipped cruiser? Pah, Liberators say "Yeah right" to missiles. In all my ooRP LPI skirmishes against massive fleets, I never got hit by one missile. The Liberator is a force to be reckoned with.
EDIT: Sounded like I was bragging. Not the case. I just am saying how hard to hit Libs are. Missile cruisers don't pwn them.