I'd Like to Use a Lifeline

*feels like that could be a hint hint nudge nudge thought*

But I will be honest, DbtD was my favorite piece to write and a big part of it was I did have some freedom to create. When you are expanding a piece of the world that has only a barebones framework, you are free to roam without worrying about someone scowling and smacking your hand with a stick at any tiny deviation from canon. It's very liberating, and with that freedom any one of you could do just as much (if not more).

Also Starky is amazing at taking the little nuggets and world building off of them. Which she did in Dany by the Docks was amazing. I still swoon over her Bravvos.

If they are bleeding together as you write, it means that the characters themselves - personalities, dialogue, particular scenes you want - are actually what you are more interested in right now. The worldbuilding is secondary.

This may sound crazy, but I actually recommend just writing those portions out now. Don't worry about which fic they fit into; you can decide that after you have completed them. After they're done, you'll know where the pieces will best shine.

When a writer is faced with indecision, or is reluctant to write a chapter, it's because they're dreading something. Whether that is making a tough decision, or typing out something they are obligated to write but don't really feel like writing, etc. Don't write what you are dreading. Write all of the other stuff surrounding what you are dreading, and go back to that piece later. And you may have an entirely new approach to make it fit at that point.

I am using this little nugget in one of my stories but I am willing to share--In ASoIAF we have wargs, but some people call them skinchangers.  Are they the same skill?  The Faceless Men use faces to transform.  What if skinchangers do not need a face of a dead person, but can just transform in anyone who is dead?

I will spill the secret to that awesome Braavos that made everyone fall in love with DbtD.
I mean, besides Starky's general awesomeness and insane dedication when she's on point and driven.

A map.
That extra whatever money she spent on a specific Braavos map gave us things like that diving scene in the Drowned Quarter, which, if left to the book's alone, we wouldn't even know Existed.