I don’t presume it sounds absurd to forget what a spell’s functions are mid-flight, even after reviewing them prior to initiating the flight.
Consequently, most players who draw a blank at what the dragon’s spells do end up either using them incorrectly or using them inadequately. The simple solution to this issue would be to include the spell descriptions in the flight screen, preferably in a panel off to the right side of the screen, and preferably in a more succinct and less time-consuming form; the ideal length would be one that allows for an efficient review between islands or when flying past towers that have an insignificant impact on the dragon’s health. The panel would also include the spell icons, so that players don’t have to waste time scanning during the flight if it’s a specific spell they’re inquiring information on.
Allowing spell descriptions in the flight screen would cast a safety net in the event that the pilot forgets how to properly use a spell. For better space management, fliers who feel confident in their ability to memorize spell concepts and incorporate them into flights would be able to turn the feature off.
What’s more, I believe that all spell descriptions in-game should include the cooldowns and durations, as I previously suggested here.