Yeah big note to new players, black box missions are easy money until u find one thats got 2+vipers guarding it. ONE death and u loose all the BBs u carring. You can open scoop, hit limpet/scoop it and FSD but dont do it while loaded with the 4 easy ones you did first, (im new too, learnt that the hard way)
Just got my imp curry, it can pretty much clear a whole BBS of combat and a mission that says kill 2, plus a mission that says kill 3 of the same is just kill 3 ( im sure it just work that way for me - somebody correct me if im being crazy)
Also the massicer pirates missions are funny cause u find them all in one location but they "let you" 1v1 them, im really happy 3 pythons and a chief didnt all shoot me at once. ****Only works if you empty, even limpets count as cargo, 6 pythons just mudered me
Also when u following a Chief and a Challenger in a wing expecting to FSD interdict them, just abandon this one you will know when u can take them. ( i got squished )
Im on XBOX incase some of what i said is different
Also if a target of assination interdicts u, maybe let him - if he fires first you get police turn up and still get paid/credit/bounty really helped with the Fed Assault ship, on our 1st meeting he put me to 16%, i just about escaped
I found the Cobra a little flimsy to be reliable in combat, and my imp curry well capable but limited right around the level the OP speaks of. Prob get the same result from a vulture, it cost me about 2-3 mil in Insurance claims / lost bounties getting that right. ( i also diamond mine in a Keel - so i really dont care )