We've found them to grow in typical lowland conditions, and use our typical Nep mix for growing them. Nothing special required. We'll be keeping a careful watch for any tendencies to have a little "dormancy period" at the end of winter. I believe this is the dry season for southern Thailand.
One of our grade A "personal collection" plants is flowering, and it's a female! She's still acclimating, and the blooming was probably initiated by transplant shock, so the spike will be removed to encourage further growth. She's very healthy and look forward to her blooming next year, hopefully a few male Vikings will bloom at the same time.