Today i've cleared a system from two
precursor 8600t ships and six FACs only with 12 fighters and 3 FACs with no losses on my side.
They noticed my active sensor emissions, but they were not able to target my ships.
It took some time to kill them all, because my fighters had to rearm and refuel at their motherships in the next system, but they finally blowed them to pieces.
I had luck i did not encounter their AMM ships.