Never pressure Baiken >< just stand from outside and use Ghost to harass her. If you have Sword, run around and cross up by using Hs, if you have dog, just stand still and wait for her movement. I have played Zappa for 2 years, but just have figured out how to deal with Baiken after being defeated so many times.
Btw : Is anyone here still playing GG via Net on #Reload version ?? I never ever met someone who played Zappa and was able to beat me down.