Note that most fields are balanced to need 2-3 mining ships to fill the hold of a trader. Some fields turn on the optimum profit at 5-6 ships but most are 2-3.
We did a retest of Dublin today. We filled a 5K transport in 20 minutes with two mining ships. This is the target rate. You (and pirates) can have significant amounts of RP if you do this right. Did I say RP? I meant money.
EDIT: two mining ships = one mafic + one miner
EDIT: at the old buy/sell price = 12500 x 5000k = 62,500,000 per trip in one direction.
Proud member of "the most paranoid group of people in the community"