I'm having trouble figuring out the fingerings for the following passage I transcribed myself. It comes from a piece called "神さびた古戦場(kamisabita kosenjou) ～ Suwa Foughten Field" from the game 東方１０ (Touhou 10). The rests in bars 1 and 3 are place holders for bass notes which require a jump to and from the alternating octaves in bar 2. The octaves and the run can be considered two seperate voices, of which the octaves should be brought out.
The problem lies in the fact that the run goes right through the alternating octaves at high tempo. Should I just practice more and play each of both voices with one hand? If so, which hand should go over the other? Otherwise, how should I distribute them?
single staff version: