On that last move, after dropping from Double-Or-Nothing into a single trapeze, and then the whole move-thing into Triple-Or-Nothing, here’s what I do:
On the first pass over your throw-hand, where you’re basically in a Double-Or-Nothing with your throw-hand index in the second loop, I immediately snag the closest top string with my throw-hand thumb and pull it a little closer to me. That helps me spread out all of the strings quite a bit more.
The next pass after that, that’s meant to finish in the Triple-Or-Nothing, while you’re passing it up and over your non-throw-hand index finder, I shift the other strings back past the closest knuckles on my fingers, and use my knuckles to help keep them spread out a bit.
It sounds like it’s basically the same as Yoyogems discussed, with the exception of the throw-hand thumb snagging that closest top string.
I also had to start envisioning the yoyo kinda spiraling out away from me and the string spiraling inward toward me. When I first tried it, for some reason I had it backwards in my head and I was always hitting basically every string when landing the yoyo.
This is a move you can really slow down and take step by step. That is, do just that first pass over the throw-hand and let it stop. Make sure all of your strings are correct (i.e. Double-Or-Nothing, but throw-hand index in the same loop closest to the yoyo). Shift them around a bit. Then give it a swing up and over the non-throw-hand.
I find practicing the Shockwave after Magic Drop move helpful, too, because it’s a similar type of move.
Also, just practice Triple-Or-Nothing by itself, or even as part of Rewind. I have kind of short fingers, and even Rewind sometimes gives me trouble if I’m not really thinking about the position of the strings over my fingers.