SW3 - Surviving X244 (Spoilers)

[Razz]

I have big problems with battling berserkers in X244 system (hope that number is correct, it is two systems away from precursor portal system). system has huge map, few random encounters with berserker squad and portal guarded with super chimera and lot (40+) fighters. I ussually manage to destroy super chimera and about half of fighters when animation begin and two other superchimeras with about 20+ fighters arrives.
After animation battle gets extremely tough, new fighters propably get free shot on my fighters when they appears so lots of my ships are heavily damaged and in short time destroyed.
I have 5 pilots, all but Validol in gen 4 ships, all ships have best missile defence, best laser defence and experimental shields. Weapons vary, but not best, mostly 3th gen.

Do you have any good tactics to win this battle ?