jump from b to magma bound?

ive been practicing magma bound because i love the deco, and i have it in 4 runs (0-47, 44-72, 70-82, 80-100), but i dont know if its worth actually trying to beat the level because 70-90 was torturous and i dont feel like im good enough to get consistent at 0-70 because of the mini cube.

if anyone has done a similar jump i would love to know your thoughts !!