using another world to farm also cuts down on lots of time with regards to getting resources like metals back to base. you can be at a mine or crypt in the other world, load up on ore, log back in to your main world where you logged out standing next to your storage chests and.......BOOM! put your ore in storage and log back in to the other world where there you are still in the crypt :-)

it is cheesy but.....oh well.