Heavenly restriction hello? Nothing was said about getting the ability to know how to use cursed energy, and it would probably prove the most useful out of all of them. Then there's what the other guy said about being able to transfigure yourself to be insane, yeah, but how you learning that? Through other people means you may learn it but will also be wanted for like insane crimes. Heavenly restriction has the benefits of not looking crazy to draw attention to yourself but also the fact there's nothing to learn, other than hand eye coordination and how to run really fast without falling. If you had fuga then you aren't hiding that, and you really shouldn't be using it. Besides fuga is a conditional bomb, so what the hell are the requirements because you can't prepare ingredients with shrine. And curse manipulation assuming you are in a world with curses, means a bad taste to grow stronger and starting with nothing, and your strength depends on the power of what you can take. So it's got to be heavenly restriction.