Update: commenter DTB suggests cheesing the NPCs by running past them and climbing to the ladder
Update: commenter DTB suggests cheesing the NPCs by running past them and climbing to the ladder. Apparently they’ll often fall in the ledge into their attempts to achieve you, and fall on their deaths. Just be careful to never fall down yourself!
When the pair are down, you'll be able to wander back on the crab platform, climb the stairs in places you fought the powerful spell caster and shield grunt, and please take a path with the middle level to lower down a group of Path of Exile Currency ledges so you may collect the Golden Falcon Shield. (You can do that any time, however, you don’t need to risk aggroing both enemies at the same time by getting too close.)
Before you pass with the doorway the NPCs were guarding, you may would like to venture into your swamp to accumulate the Great Swamp Pyromancy Tome. It’s on the base of any tree near to the wall to Buy POE Orbs your right with the doorway since you face it, guarded with a giant crab. Drive the crab to burrow some times, and produce a dash for this. Return this item to Cornyx to unlock new pyromancy spells.
When you’re ready, head from the doorway the NPCs were guarding and collect the Homeward Bone within the balcony, then descend the ladder to activate the Farron Keep bonfire.