Ultimately, like, making or learning a BM is not that big of an investement and as long as we don't die there really isn't a downside to knowing it. Mostly cause we will only cast it against opponents who could kills us if we go in with a sword.
I actually wonder what we're going to spend CF on after Orb flex.
For the matter I'd really hope the reward for Orb flex isn't just more CF because we'd have way more than we could possibly spend then.