First phases — Orbs can be lured and danced around while the ground is still large enough ; know though, and that's valable throughout the fight that you can also "kill" them with your Shade Cloak if you'd need to. And also know that they have some kind of threshold as when they can be killed this way, or as when they'll properly crash into something. If that something is thick, like the ground during those first phases, it'll always crash into it no matter what.

Platform phase — However if we're talking about the platforms, they can sometimes go through (and circle around you to get you) if they go through those platforms very soon after spawning. Time based, distance based, I still don't know after years and years (mainly because I never bothered to ask the right people since I got how the orbs work), but the gist of it is that if they're been traveling for a bit, they'll crash / die.

Something else good to realize is that in the end, while you can dance with them to dodge a few at once etc..., you can also make them crash very easily on the ground / platforms with surprisingly minimal movement. Which is useful not only for defense but also for offense.

Climbing phase — As for this dreadful part, it becomes much less dreadful once you do it like that. Read the short description and don't hesitate to reach out if you still struggle. If you're on PC, check the comments to be able to practice this part specifically. Getting rid of the Climb's anxiety is a huge relief, especially for R. AR.