I have tried both; 1 does work, but it is inefficient. 2 is the better option but do a variation of it. Have a ship that is fast, cloaked, and with thermal reduction go in first, have it get a ways inside the system then blast on the active sensors and at the same time bring in the fleet. There are counters to this like having a heavy defense station with large active sensors on the JP and escort stations around it.