What works for me is having two pots, a larger plastic and a smaller clay pot. set the clay inside the plastic and have sphagnum in between the two pots and thoroughly wet it. The moisture will wick from the sphagnum through the clay to provide near 100% humidity inside the clay pot. This lets plants send out roots even if there are non to support the plant. when it has at least 1 inch of a new root I would repot it. I would keep it in a little more shady spot until new roots can anchor themselves in the media too.
I've also just thrown crippled plants like your bellina in some CHC and watered them like every other phal I have and it's now established itself in it's pot. As long as it's sanitary and the growing conditions it's in dont vary too much it should be fine.
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