-indy-: The previous idea for completing "Corporate Holdings" does not work reliable unfortunately.
I had the same problems again on this run.
New solution:
Edit the .ini file of the small fuel transporter to give the transporter lots of hit points (or use the attached mod, rename jpg to zip).
Jump into the Dagda system via the Prestur L-Point.
Quickly destroy the mines.
Quickly jump out of the system (jumping manually should be fastest).
Wait for the transports and sometimes the Maurader attackers.
For me this was the best solution:
Jump into the Dagda system via the Prestur L-Point.
Quickly destroy the mines.
Detach the t fighters
Quickly jump out of the system back to the Prestur L-Point and wait
Transports come though unharmed in a few minutes
Make you way back to your base and the t fighters magically reappear