The only way i see is the possibility to run a partial save set recover 
(recover -d destination -S ssid[/cloneid] -a full_pathname).
Be aware that you need to be precise about the exact path name. It just 
compares the string you provide with the pathnames read.

I never used it without the -a option.
I never tried whether this command accepts multiple path names.
I also did not pay attention whether this will speed up the recovery (can/will 
NW not start reading from the beginning of the save set?)

Besides that you may of course use multiple command/terminal windows to run 
multiple processes simultaneously.

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