Angraecum Leonis in Spike - Culture Questions

[jiblylegs]

A couple of months ago, my angraecum leonis put out two spikes and all the buds blasted sadly. I now grow it in my green house at 85F, 60% RH during the day, and at 63F, 80%RH at night. I really want to avoid losing another set of blooms. Anyone who has had luck blooming this species, are you aware of any specific needs for this plant while in spike? I've read others have had difficulty with the buds blasting.

Also, I'm really proud of how large this plant is getting and wanted to show off its 10 leaves (with another on the way). I believe this is the Comoros Island variety as it is rather large.

[url=https://flic.kr/p/2okfuq8]
[url=https://flic.kr/p/2okd2WD]