Your specific problems seems to be either too much water, or too little light. From my experience, all oncidium related orchids do like at least some more light than an average phal.
Also, when you keep a plant in a darker place, it will tend to lose water far slower than one in bright light, where it uses a ton of it.
From what i see, the leafs are wilting, not crisping, and the rest are a vibrant dark green - a wrong color. My Brassias have leaves that are much paler and stiffer looking, as well as multitudes of new growth.
Another thing - that is WAY WAY WAY too much fertilizing and watering for an orchid that isn't growing. Stop for a while, let the baby roots develop; there's nothing there to absorb all of it if you had to remove lots of dead ones.
In short, try the following - put it in a place with great light, such as directly onto an eastern/western window, or behind a courtain of a southern one. Let it almost completly dry out, and then resume watering but only ever when it is just barely moist; do not overwter. And you can comfortably cut down the fertilizer to once a month (i certainly hope you were dilluting it all this time).
A side note - if it's Brassia rex, then you'll have a hard time reblooming it. I have three, never rebloomed, and have been told that specific Brassia is notoriously stubborn to rebloom in many places. I also have oncidiums and hybrids labeled odontoglossum/cambria, as well as have killed milltonias in the past. Together with Brassia, they all do well in very high light, kept just barely wet.
P.S. If you do have a Brassia rex, keep it cool and dry during the winter. I am talking real cool; mine have overwintered outside at 4 degrees celsius and seem better than ever.
Hope some of it helps.
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