humidity high water low after repotting to promote roots?

[nogreenthumbs]

I've seen this sort of recommendation a few places. I just want to make sure that it's valid (I did just read it on the AOS website, who am I to question).

"Keep humidity high and the potting medium dry until new roots form."

"Keep the plant humid, shaded and dry at the roots until new root growth is seen."

I've got a Cattleya that I think I over fertilized. Lc. Chyoong Guu Hsin-I 'Ruby Lip' if it matters. It doesn't have a happy root system. There are some tan roots that are still firm and plump. I bought it last fall, and after the blooms faded, it put out 2 new growths. I've recently repotted it. It's got 2 more new growths coming, but the 2 growths from this past winter are kind of small. It's also got another bump that looks like another new growth and, I assume because the roots aren't great, the p-bulbs are looking a little sad. I'm hoping that some of the new growth starts to put out some new roots.

Basically, I want to know what my best strategy is to preserve this plant and it's new growth and sad roots, and hopefully, put on some new roots too now that I've got it repotted and have learned how not to feed.

Help me save my eager, but slightly sad orchid.