Mind you, I'm no Dendrobium green thumb, but like you, I've giving myself another try. There are way too many Dends for me to remember who likes what, so I've been trying to learn the different sections of the genus. Culture tends to be similar within each section or sub-section. Still, there are so many!
Aphyllum and anosmum belong to the section Eugenanthe it also goes by other names. That section wants no water in the winter. Both kingianum and speciosum belong to section Callista. For them, water should be cut way back and no fert during the winter. Give just enough water to keep the stalks from shriveling too much.
Murray will surely have more to add!
I just ordered Bill Lavarak's Dendrobium book. Howard Wood's new book looked intriguing, but at $150 cover price, I gave it a pass. I'll let you know how it is when it arrives. It was only $24 and got good reviews.