The ultimate grind (nearly). After 238 hrs of play-time, I got my double Elite. The Explorer one was fairly easy at 41.5 hours, but I had to blow up approximately 8000 ships to get my combat Elite - nearly all done in a high RES. I was blown up three times: Once when I shot a Gunship and forgot about its fighter, which got me from behind before I had a chance to fight back; once by the feds when I made a mistake just as the bad guy blew up, so about 12 of them of which 6 were Anacondas, turned on me; and once by a Cobra with rail guns after I suffered a ram and scan from another ship, which took down my shields and 40% of my hull in the middle of the fight.
I earned 413 million in bounties doing the combat, so that's an average of just over 2 million an hour, though I was playing for kills rather than credits.
Now I'm thinking about how to get the trading Elite with only 5T cargo capacity.
https://imgur.com/a/oqX1G