There is only one real prerequisite for this trick and it’s the Raiz. Most people will learn the high and floaty Raiz first, as it is easily progressed into from a Tornado Kick. But for the Touchdown Raiz you’ll need to relearn it, because you need a low and inverted Raiz. Kind of like an Aerial on your bad side.
To achieve this you’ll need to change the way you setup into the trick.
Instead ofjumping with your upper body high and horizontal to the ground, you want to bring your upper body low to the ground before you take off. Similar to an Aerial.
Spot the floor even before you takeoff and keep your gaze fixed at this point.
Swing your backleg right behind you, above your head to achieve as much flip as possible (again similar to an Aerial).
Push your hips up so your legs have more room in the air to come around.
Swing your arms wide into the trick. This will make the transition to the Touchdown Raiz easier.