[quote=@Blitzy]
[@Ezekiel] how closely do you want to stick to the canon? Dorne are my favourite kingdom and would be my first choice but obviously they weren't part of the Seven Kingdoms at this time and played no role in the Dance of the Dragons (please correct me if I'm wrong). I haven't given too much thought to how exactly I'd get Dorne involved but just wanted to know to what extent it would be possible if at all. I'm more than happy to play as another house for the sake of simplicity.
[/quote]

Dorne might not play a huge role in the Dance, but they're very involved in the current conflict over the Steptones. They're allied with a bunch of the Free Cities against Daemon/House Velaryon/Pentos/Braavos and the unaligned pirates, so they're really involved right now.

Sticking to Canon is less important for those houses not tied to the established Royal family at this point, so, you'd have a lot of creativity with House Martell.