When I still lived in the states I mounted most of my plants on cork or grape vines. Now that I live in PR and tree fern is readily available(no Cork is virtually nonexistent here) I prefer the tree fern. I fond that It is the best material for mounting. There is a lot of space in between the fibers which creates a humid environment for the roots while being free draining. The roots also love to infiltrate this kind of material. When the mount has deteriorated you can simply break away the mount without destroying the roots. Not to mention the fact that tree fern is cheaper than cork.
I use fishing line for mounting. It is important that the plant does not move at all otherwise it will never establish itself.
Have you been to Parkside nursery in PA. They were my one and only suppliers while I lived in NYC. They would be happy to show you how to mount, pot, or do whatever.
I have 2 mounted dendrobiums that are doing excellent. I'm hesitant to try phals, afraid I couldn't keep them watered. Funny thing about me is, I underwater in moss and overwater in bark!
People underestimate mounting with zip ties. I think they work very well, especially with a plant that has thicker roots that will attach themselves. Once the plant is attached, cut the tie. Plus, it is much easier than using fishing line for your first few attempts.