What can I do to speed up this report?

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I have a report that is intended to provide my team with a list of all new hires (accepted position in the last 30 days) and show what requisitions they are still active on in order to make sure we are withdrawing and they are not staying on active requisitions for other recruiters.  I am querying against another report and using anyone that has a req with the same name as someone with an accepted offer.  The report works, it just seems to be hit and miss if it wants to provide results.   I have tried using the most advanced