You don't have that choice with uncertainty of confirm berth, as most other options are in WL!! Further time taken by any option is nearby same & with this combo you get peaceful night travel along with same station connecting option!!
Anyway...all the best!!
You can try below option as well
DNR Pune exp till bhusawal and than Vskp-Gimb exp from bsl, buffer will be approx 3 hours.