Hi Andres,
With ENABLE_HANA_MDX you will push the MDX calculation to the HANA engine, which in most cases improves the performance a lot.
Before applying the note though, go through the note: 1904344 and check the restraints.
Another options if you cannot apply that parameter is to use Parallel script execution:
And of course, try to maximize *XDIM_MEMBERSET as much as you can, if you're not already doing it.
Cheers