Bare-root Octomeria: separate distinct rhizomes?

[tropterrarium]

Just got an Octomeria gracilis as bare root plant. Turns out that the bundle of leaves is composed of seven distinct pieces or rhizome.
- Is there any value in keeping them together? Are plants growing better in clusters?
- Or could I separate them and experiment with different microclimates in my GH?
- Last but not least, Octomeria seems to be an epiphyte. I have O. juncifolia on a wood plank with moss. How do you grow yours? Mounted or potted? If mounted, on wood plank, wood branch (I have manzanita, orange, and hibiscus available), cork, tree fern? Rhizome and roots look like in need of plenty of moss.