Help needed on Oncidium repotting

[Luckyelfie]

I have an Oncidium Volcano Queen that I bought despite knowing better. Her leaves were battered and so were her pseudobulbs. It looked like she was planted in dirt but I convinced myself it was broken down coir.

She bloomed beautifully (though the aphids loved her more) and now that she is done I decided to repot. I found she was potted in regular potting soil and she was so densely rootbound I had to hose out the old dirt. There were a few new root tips.

I just shoved her in a pot with bark, medium perlite and a bit of spaghnum since she was so used to wet soil. I couldn't get the media anywhere other than the sides of the rootball. What do I do with her?