As a general rule, any Angraecoid that has thick warty roots (like didieri) prefers, if not, requires, mounting. In a pot the roots really tend to rot and usually a plant will send out aerial roots...far away from the pot anyway.
It lives in Madagascar at elevations of about 2000-5000 feet, so intermediate temps are best. It wants a cooler and drier winter with much less water but still good humidity.
One 'trick' that is true for Aerangis and i suspect is true for Angraecums (and maybe all orchids that want a rest period) is to keep an eye on the root tips. If there is a nice long green/brown/reddish growing tip, the plant is in active growth (regardless of what leaves are doing). If the root tip gets covered by velemen extending down over it, the plant is in a rest period and wants less water.
yay for Angs!!!