(Reporting for a friend, haven't tested it myself cause I'm moving)
Apparently, Miners AI first go through all the low-level ores first in a sector, before going to the next level.
So first they mine all iron, then all titanium, then all naonite etc..
Would it not be a lot smarter to have the AI mine the closest stuff first, or perhaps even mine the highest that they can mine first?
Perhaps a option to select this would be best..