Just so you know, Astm. ampullaceum has the habit of sending out multiple spikes and also because it often rebloom from the same leaf axis. Unfortunately, none of its hybrids carry this trait and because it came from the moonsoon belt, it can tolerate low humidity for extended periods, especially during winter.
Others great Ascda hybrids to try are:
Sukumara Sunset, John Debaisie, Go Chai Lang.