Honestly as long as you have acompetent pilot(s) on your team long toms can become a non issue, provided aeros are available. In a single round of sandblasted on the TLL Texas server I destroyed no less than 20 Long Toms with my Shiva C, barely giving them enough time to roll out of the hangar and get off a couple shots. However, once someone decided to start hating the sky and everything in it with a single RAC2 partisan, pretty much the entire enemy side of the map was shut down to my bombing runs. Sure, I MIGHT get off a bomb drop but I wasnt making it out alive. Ground support was obviously incapable of dealing with the one partisan considering if I wasn't flying around, Long Toms were destroying everything.
So, as previously stated, if aeros can make it through the absurdly powerful AAA, the Long Toms wreak significantly less havoc. They should not be on maps without air vehicles, however.