Anti Fighter beams (AAA). They're utterly pathetic vs shields, so unless all of them are altered they might as well not exist if they are blocked by shields. Beams are so bad vs shields, in fact, that I imagine you could even survive direct hits from heavy beams like BGreens and the like (you're actually not automatically killed if hit by one of those, they just kill you really, really fast due to insane hull damage. Even without shields blocking beams, it's actually possible, just barely, to live through a hit from an LTerSlash in an Ares, though you'll come out at 20% hull or so).