i'm currently stuck at countermeasure: i can by (by now without effort) wipe away all the fighters, and then am left with the two beam stations and the mission target. i am usually able to pick up 12 beam artillery shots, 6 guided ordnances, tons of plasma flak and good health/shield.
i fail, though, to destroy the beam stations. none of my weapons reach further than theirs, it takes them just two or three shots to take me down, and they don't seem to follow me so i could distract them from the mission target and outrun them afterwards.
is there a hint you can give me without spoiling too much or is this something i have to be able to find out myself?