@@djchips5050 2:29 is free 💀. (my opinion at least) Plus, the dual wave is shorter than the dual. [speed wise] You've died way more times at the dual wave than the 3x cube dual, assuming that you did not use start pos practice on level creator.
I put a start pos at the beginning of the cube/cube dual and just died over and over until I got it. The first time I made it through without dying, I ended up doing it again, and again, all 3 in a row. Keep trying. It's a really fun dual