Additional EV servers to aid in PST migration effort

EV904

We have roughly 10TB of PSTs we need to get migrated into EV. Our throughput we're seeing is not overwhelmingly impressive - roughly 1GB per hour. We are going to utilize either EVPM and/or Locate and Migrate for the PST migration work.

Would it make sense or be wise to stand up additional servers to aid in the migration?

If we did create additional servers, would they each maintain their own indexes, or can they be told to use the index locations of the primary mailbox archiving EV server?

Is there somewhere that shows hardware requirements for an archiving server such as this?

Thanks as always for any assistance.