Wait, so you are going to combine textures of different characters to form an entirely new texture?
I'm not so sure which is my favorite. I use default for almost all of my characters. I like Golden Ike (but I don't use Ike in P:M) and the Dark Link duo.
Vertex hacks; textures that're more complex than recolors; will often cause desync if the other player don't have that same vertex on the same costume(s).