For fast farming you can go to the north of outer la noscea in the mines, theres 2 fates that spawn back to back infinitely, Full Metal alchemist and making the rounds (think thats what its called), with BLUs you can clear both these fates in 1 gcd so you can clear multiple fates a min.

So far I've only had one person ask me to stop being blu, but honestly its not like playing blu is a reportable offense so I'll just keep doing it, got 4 weapons in half an hour, feels good.