Don't forget they still have their element powers, so technically Didani could use her fire element to slow her decent. Same for Xuno, she could use her wind element to slow her decent even further that just relying on the air around her from falling, or use her water element in combination with her wind to create a water cushion of some kind, or create a bubble of water to catch her and use the wind to glide her down to the ground.
Using their elements has no real restrictions, aside from imagination. The way elements work in this world is that they use their Mind, Body, Soul, and the most important part Imagination. If they have a lack of imagination, they will probably have a hard time controlling and manipulating their elements, while those who have an active imagination will have an easier time. If they can imagine it, then it will most likely be possible to perform, they just have to implement it into action and imagine how it would be performed.
Also it is possible to combine their elements to create new elements, but only if it would make sense for the combination. For example, for being able to manipulate Blood as an element, for me, I would think someone would need the elements Water, Heat, and Metal.
Oh and just an update, I am in the process in updating the Character Creation page by adding in the links to each Creature's wiki page, so that way instead of searching them up, you can just go straight to their wiki page. Hopefully, it'll be done by the next time you're online.
Thanks to you telling me how its done, I it will make things a bit more easier, and for future posts, I can link images to creatures without having to put them into spoilers.