It is the wings... flight is considered a very powerful ability, and they can do it as often as they would ever need for combat, and even some fairly detailed aerial scouting prior to combat.
Well, depends on how good people are about using on-line sites that auto-calculate stuff for example characters, but we can certainly hope so...
(But I guess this means I don't have to be TOO worried about getting the monetary accounting right on all of the example characters, and can even just pick equipment that "feels right" in many cases?)