The secret with this one and with some other angreacoides is probably to grow them in Rockwool grow cube.
All my plants were in rockwool some years ago. As I had more and more problems with it, I stopped to use for the majority of my plants but I kept some of them in it because it's just perfect.
Sesquipedale, magdalanae, Jumellea, some Laelia like tenebrosa.
I love this Angraecum. It's such a wonderful group of orchids. I assume this smells pretty divine in the evening. I have a couple of smaller growing Angs, but I don't think either of them would enjoy rockwool. My Aeranthes might be happy in it, since it appears to like a lot of moisture at the roots.
I do know Phrags love rockwool (at least the wet growers), and paphs grow well in it so long as you're cautious enough not to over water.
Yes, pre treatment with a water pH beetween 4.8 to 5.2. I add acid as pH It should stabilize at around 5 in the time.
About culture, almost like Vandas for light but need colder temperaturs ( 15°C ) some weeks in the night to spike. (But that was before its season problem! :-D )
Always wet with rockwool of course and non acidifiyng osmocote.