Yeah, ballance is the key, time is the problem.
I was building pulsars and gunships (protection vs. corvettes) and it really worked.
I forgot to tell, that I was even able to destroy one teleport and beacons on one asteroid (there are three asteroids with two beacons on each one, I assume there are also three teleports).
I have sent salvage orvettes and that resource collector to the nearest asteroid field.
Now I have no time to build strong anti frigate force to face incoming frigates, and there are really lots of them.
Maybe the key was to take out enemies resourse collectors, I failed doing that.
