I'm having touble with the 3rd mission(when the two narn transport and the three centauri warhships start a small war at Atair station), and the 5th(?) mission(where you have to shoot the rocks to protect the wellington).
In the 2nd mission the only way I could save the centauri transport is to use a badger and quickly destoryed one of the transport, but then when the three centauri warship arrive they usually tear the scylla to pieces in less than one minute.
I tried to destory one of the centauri warship to even the odds, but it's hard to lock up a bulldog with a sentri up your behinds.
in the wellington mission, I simply can't shoot down all those damn rocks in time. I try using the 60mm, but still there's just too many of them. I also have diffculty seeing a rock, since the lighting is somewhat poor and sometime it just completely block out your screen.
I had to skip those missions to finish the compaign, but I'm hoping for a good strategy on my second run.