Searching for users by Total Contributions (CiviContribute, Drupal7)
If I read you right, I would recommend the Summary Fields extension which then lets you have a standard Custom Field for Total Contributions and you can build smart groups etc off that field.

(Note (Feb 2019) there has been very recent discussion about some blips with the latest release (https://civicrm.stackexchange.com/search?tab=newest&amp;q=summary%20fields)