The Guardian Moss farm is much the same as the Rot Wallow Tusk farm, only more frustrating due to the very low drop rates of the run: the single guardian in each group of 7-8 wallows often fails to drop any item (let alone the desired moss). This might be one of the few Item-of-the-Week farms that is more productive in Hard mode, as the Guardians are perhaps more likely to drop something. This week is a good time to farm faction (most likely Luxon, but possibly Kurzick); you'll easily earn back the cost of the blessing even during the shortest farm.