I can't quite manage the L.H. (without some mistakes) at ♩=162 no matter how much I practice.
You may already do this, but I would:
Practice the measures leaving out the lower note of the octaves. So you would do: 1 3 2, 1 2 3, 2 1 2, etc.
Practice the measure leaving out the upper note of the octaves. So would you practice 5 3 2, 1 2 3, 2 1 2, etc.
Practice as written.
Practice the note from the previous measure and the first four notes of the current measure. So you would practice 2 5+1 3 2 1. Do this for every measure applicable.
It's important you don't play faster than you can. In other words, practice slowly with performance tempo in mind (don't do motions you can't do in performance tempo)
1+5 3 2, 1 2 3, 2 1 2 and repeat.
I generally use the same fingering.