There is yet an another method that if you so chose to do could direct the 
index backups, if you were to select no index backup on the group ( doing 
it per client is more work) and then use savegrp -O with other pertinent 
switches & with appropriate pools & devices association, you can re-direct 
the indexes.
I like the idea of backing up the indexes to one pool at once compared to 
automatic bootstrap\index handling of networker if you wanted all indexes 
to one pool, however, i am not a fan of trying to re-direct index for each 
and every client, unless you have some special requirements ?
HTH

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