As far as I know ukf is the easiest faction to kill with base rape. This is becouse they have harder time getting AT and snares. A 222 rush can kill your base before you even get started. Usf suffers from that as well but they at least have a snare to defend.
Other 3 factions are really hard to kill with base rape. With sov and ost you simply build the cheapest building in the corner. Even a ghost is enough not to lose. And you can have multiple. So it is much easier to survive. Okw is also in a good spot here. They can't build multiple buildings of the same type but they can hide them all around the map making the process of finishing the base much longer.
Honestly, the fact that you can technically rebuild your base for free doesn't really matter when you consider that you will see a game over screen before being able to do that.
Off topic:
