I really love that speed vault animation, keep it up also that 3d looked cool dude keep developing that aswell. That tumbling looks nice, take this as a critic, no hate/offense. Work on the round off a little (gain momentum more from the run / hurdle, make it faster than that one) and raise up higher for the backflip. DO NOT bend the legs too much after the round off, all you need is a blocking (which is sometimes gonna appear slightly stiffer) so you gonna land after the round off but make it more straight leg-ed like what I've said DO NOT bend too much but you can give it like 1-2 frames it depends on the momentum though, and also not if necessary. The flip itself wasn't bad, the pose itself needs more exaggeration. And give it more air time like some frames (you do the math) if necessary, because it's too soon for him to go down. The landing looks awful, I told you, no offense bro. It's pretty clear that you're trying to balance the landing with the hands to prevent him from falling, but what makes it looks awful is because you skipped like 1 keyposes after the flip, so apparently he's flipping and he's like "fuck it" then baammm, he didn't even prepare for the landing (spotting), DO NOT bend the leg too much (it depends on the momentum though, but i'm saying what's in the animation), just bend it like 1-2 frames and make it a straight leg-ed stick then you can easily move the stick to anywhere (except if he's landing from a really really high jump then it possibly bend that much) or if you actually want to bend it, then bend it fluidly but not that much until the bend can touch the ground lol. Not bad that all dude, you've got a lot of potential in it, I also love acrobatic <3. And you know you need to give a "you time" more in animating. Also this thread is lit bro, can't wait to see another trickster in TDD :p. Oh and if you want to learn more about momentum, landing etc, there is a tutorial it pivot tutorial section, someone reupload it from the old A net forum if im not wrong. Btw. finish that damn 540 kick in discord bruhh. Keep it up huh!
edit:
Oh so you asked for a rank huh :P
Youre med-high beginner for now, but sometimes you're kinda close to intermediate, if it's that close too then you're not far heh :3
Also you're p good for now, good job on that, be better so you can be inters