A claim to remove the deprecated Ascadian Bluffs region assets from the Saros Archipelago and replace it with something ashy as per Bethesda's Firemoth. As the Firemoth section is an esm, this claim should be made as an esp dependant on that esm.
The finished area will be part of either the Bittercoast or Roth Roryn mechanically and could take cues from either region. Vanilla inspiration can be taken from the Caldera mines (ashy West Gash) and Fort Buckmoth (ashy fort.) A dirt path should be added from the landing zone (-7, -11) to the southern entrance of the fort.