I have a list, a link to which was posted in the FDev forums (but later disappeared), of M3M settlements that can be easily scanned/farmed for CIF every couple of weeks netting about 60 CIF and 50 MEF per lap. It takes a few hours to run a single lap, the settlements are all identical in layout with only four (4) data-points to scan per settlement and the route-time-limit is about 4 minutes long to scan those 4 data-points. It is
Data-Point Scanning For Dummies. Some settlements drop zero (0) CIF, some drop 3 and some drop 6.
When I get home tonight I will post a small spreadsheet of the systems and settlement names. The settlements are all easy to find, reasonably close together, just select them in the galaxy and system maps, respectively, I do not remember if I had to scan any NAV beacons.
It's a bit grind-y, scanning the exact same base layout does get monotonous after the 20th one but the list is only about 30 or so settlements long and it is just too easy. Will try and get the list posted tonight. o7
EDIT: As promised, the settlement list:
Printed out, it makes a nice little score-card