Long-petaled phrags in S/H?

[harpspiel]

I have a tendency to overwater, so I'm trying out a few plants in S/H with LECA.

So far my collection in S/H is composed of:
Dendrobium auriculatum (switched to S/H after I noticed it liked to be quite wet even in bark, doing well after about a year)
FDK After Dark 'Black Pearl' (will remove during its rest period)
Oncidium Sharry Baby 'Sweet Fragrance'

I just added Phragmipedium 'Predator', which is warszewiczianum x humboldtii. It's a large, healthy plant with many fans and a few growth points, from EcuageneraUS. I was reading that phrags tend to do very well, but now I've seen a few things about long-petaled phrags needing to dry out, and warszewiczianum being lithophytic.

I could keep it in its own area, where I flush it and then let it dry out every few days - any thoughts on this? It's my first phrag, and I tend to do terribly with paphs, so I'm concerned.