Best spot to farm pale tongues (and Wolf's Blood Swordgrass, both of which you'll need if you want the All Rings and All Spells achievements)? Outside Farron Keep perimeter bonfire. But *how* to run the loop? One way which makes things easier, especially if you don't want to deal with two full-health Darkwraiths at once: after exiting FKP bonfire, stay right. Youll find a sleeping Elder Ghru - kill it: a one or two hit weapon is actually faster than a backstab, but to each their own. Proceed forward on the right until the Poison Ghru pops out. Kill him too - the others shouldn't spot you. Go to the top of the little hill the Poison Ghru was in front of and take out the Shield Ghru. Over in the corner, between the wall of the Abyss Watcher's arena and the rocks, is another Poison Ghru. Kill him too. By the time you finish off this third Ghru, the darkwraiths should be mopping up the crowd of Ghru you bypassed earlier. Go back the way you came to come up behind the darkwariths. Now, just approach from behind as they wander towards the sleeping Ghru, and either pick off one while the other attacks the shield Ghru, or wait until they are both distracted so you can land a blow from behind as they fight the Ghru. If you wait until they finish off the Ghru, the two wraiths will almost certainly attack you at the same time, and will chase your sorry buns all the way to the Bonfire.