I'm actually getting close to being done at this point, I'm just waiting for the sewing machine to come back from the shop (punching through a half-dozen layers of seude plus some fabric stiffener finished off the old drive gears).
I ended up going with Youki, based mostly, but not entirely, on the picture Kuma-tan~ posted earlier in this thread. Hakama in green seudecloth, and is almost done (I just need to finish sewing on the rear belt loop and then sew up the seams). The belt is actually built into the hakama, in black.
The kosode is duiponi silk with long sleeves, which are a bit flowy while still leaving my hands free. I just have to attach those and sew on the green ghost. I've got a black dress shirt that I'm going to wear underneath the kosode, with the collar tucked inside the shirt.
For the vest, I'm going to stick to the art and go with kind of loose - looser than Youmu's vest is usually pictured. Green seudecloth again.
Myon, as I mentioned before, is done.
For Katsucon, I'm using the swords from the FF6 Opera for Hakurouken and Roukunken, but I hope to have the new ones finished by ACen or Otakon - it's been far, far too cold to work on them outside. I have to measure the old swords for their scabbards, though (Ralse still has his sword...)
I'm crossing my fingers that I'll get back what I need to have this finished by Katsucon, though....
Thanks for the help, everyone! I'll post here when it's complete ^^
/\∆/\∆/\ : If you're cosplaying Youmu at Otakon, I'd love to get pictures with you!