MeowersCombat rank, on the other hand... I'm living in CZs for six weeks or so. Not forcing up a rank grind, sticking to the task at hand (winning battles, doing missions, ensuring BGS faction advantage etc.), but yet doing average of 100 kills per day (up to 250 on some days when I have totally nothing to do except ED) of opponents no lower than Competent, and I'm still halfway from Deadly to Elite.
Yeah I found the Deadly grind to Elite was the worst. My tip:
I tried AX Scout farming, but that's been nerfed. I find CZs the killing takes too long. The pirate CGs this past month showed me the way to go is Pirate Activity Threat 6s (I prefer to focus on Anacondas). All the pirates in the zone are Deadly rank so you're guaranteed good xp for each kill. Occasionally you even get an unengineered ship that goes poof and the payout is better not even including the possibility of Massacre stacking. Food for thought.