Hi Aaron,
I am no vanda expert. Here's my story:
I had a Vanda Suksamram Beauty in a plastic bucket, one long root grew into the puddle of water that I left behind for humidity. That particular root continued to grow in water (approx. 8mm) for a few months and it seemed very happy.
However, last week I moved the vanda out of the bucket because the other roots were not getting enought water.
It is now a basket with some sphag and diatomite.
My Princess Mikasa Blue is showing new root growth and a new leaf in a vase after 10days! I water it once every morning (it is autumn here).
I have a love and hate relationship with my vandas, they just drive me crazy!